[物] agravity，weightlessness，zero gravity，weight loss ；

improper，inappropriate ；

[例句] 子女在客人面前举止失当,父母也失体面. Parents are humiliated if their children behave badly when guests are present.

[例句] 如果银行操作失当，法律会为你主持公道。 You have the law on your side if the bank is acting inappropriately.

not normal，abnormal，odd，go into a (flat) spin，out of gear ；

[例句] 我不能判定他到底是英勇无畏还是精神失常。 I couldn't decide whether he was incredibly brave or just insane.

[例句] 一些人完全承受不了，结果就精神失常了。 Some people simply can't take it and they just go insane.

lose one's footing，slip，take a false step in life，go to pieces morally，blot one's copybook ；

[例句] 罗伯特失足滑下了河岸。 Robert lost his footing and slithered down the bank.

[例句] 我知道萨拉一失足就会没命了。 One false move and I knew Sarah would be dead.

fatal accident，crash，wreck，wreckage，wrecking；

[例句] 官方说这次飞机失事无一人生还。 Officials said there were no survivors of the plane crash.

[例句] 各抢救小组仍在清理失事飞机的残骸。 Emergency teams are still clearing the debris from the plane crash.

not work，not work properly，be out of order，dysfunction，failure ；

[例句] 离合器失灵后，汽车只能在二挡行驶。 When the clutch broke, the car was locked into second gear.

[例句] 紧急冷却系统有可能失灵，核反应堆有可能发生堆芯熔毁。 Emergency cooling systems could fail and a reactor meltdown could occur.

run off，be washed away，flow away，wastage ；

[例句] 数据表明，这家集团的现金正在大量流失。 The figures showed that cash was haemorrhaging from the conglomerate.

[例句] 土壤干燥时，植物会流失更多的水分。 When the soil is dry, more moisture is lost from the plant.

disappear，be missing，abscondence，disappearance ；

[例句] 搜救人员已经找到了周六失踪的3名登山者。 Searchers have found three mountain climbers missing since Saturday.

[例句] 土耳其安全部队已经开始搜寻失踪人员。 The Turkish security forces have started searching for the missing men.

（因受惊而脸色苍白） turn pale，be eclipsed，be outshone，lose countenance，pale ；

[例句] 她一看到这惨状就面容失色. She turned pale at the sight of the miserable condition.

[例句] 她突然被吓得惊恐失色. She turned pale with sudden fear.

mistermination，mismatching，mismatch，disarrangement ；

[例句] 按M键进入失谐度测量模式. Press the M key to enable an inharmonicity measurement.

[例句] 并且四体纠缠随着系统的初始态和失谐量的变化而变化. The four - body entanglement changes with the initial state of the system and detuning degree.

make an indiscreet remark，put one's foot in one's mouth，a slip of the tongue [lip]，drop a brick，put one's foot in it ；

[例句] 对不起，失言了。 I'm sorry. That was uncalled for.

[例句] 我知道他讲话的原意不是那样, 仅仅是失言罢了. I know he didn't mean to say that. It was only a slip of the tongue.

lost article，lost property ；

[例句] 我当时正在德比的失物招领处打听。 I was enquiring in Lost Property at Derby.

[例句] 请将失物交给司机。 Lost property should be handed to the driver.

[医] incontinence，irretention ；

[例句] 该药的副作用可能包括排便失禁。 The drug's side-effects can include involuntary defecation.

[例句] 人老了就往往有内急失禁现象. People often become incontinent when they get very old.

（不自主地发出声来） cry out involuntarily，（哭不出声） lose one's voice，aphonia ；

[例句] 我蜷缩在地上的某个角落，失声痛哭。 I was curled up on the floor in a corner sobbing hysterically.

[例句] 他在电话里失声痛哭。 He was in floods of tears on the phone.

fall out step，step out，step failing out ；

[例句] 为克服间接反映发电机功角的传统失步保护所存在的问题,介绍了一种利用发电机调速系统来直接测量发电机功角的方法. In order to avoid the problems by traditional out of step protections based on measurement - angle.

[例句] 最后,根据失步中心的分布情况, 利用图论的思想实现了文中的动态解列方案. After the identification of oscillation center, a dynamic splitting scheme based graph theory is realized.

be dejected，be frustrated，be disappointed，be unlucky，chill ；

[例句] 每个人都有沮丧失意或情绪低落的时候。 Everyone has days when they feel dejected or down.

[例句] 得意时，朋友识我；失意时，我识朋友。 In prosperity our friends know us; in adversity we know our friends.--John Churton

inactivation ；

[例句] 它的致密的形态是其失活的反映. Its compact appearance is a reflection of its inactivity.

[例句] 如果这些酸贮藏在细胞质中,细胞质的酶类将要失活. Inactivation of cytoplasmic enzymes would occur if the acids were stored in the cytoplosm.

oversight，neglect one's supervisory duties ；

[例句] 失察不是借口, 而是严重的错误. Oversight is not a excuse, but a severe fault.

[例句] 疏忽之处疏忽的情况;失察或失误. An instance of being inadvertent an oversight or a slip.

lose blood，[中医] hemorrhage ；

[例句] 受害者受了重伤，大量失血。 The victim suffered a dreadful injury and lost a lot of blood.

[例句] 子弹穿过动脉，他失血过多几乎性命不保。 He almost bled to death after the bullet severed an artery.

disrepair，be in bad repair，be in disrepair，fall into disrepair ；

[例句] 从宾馆到交通，所有的基础设施都已陈旧失修。 The infrastructure, from hotels to transport, is old and decrepit.

[例句] 公寓严重失修。 The flat was in a poor state of repair.