recessive，regressive，retrograde，[医] retrocedent，cancrizans ；

[例句] 我不是个遇事后退的人. I am not one of those that spare themselves the trouble.

[例句] 更快的浏览速度,前进与后退的速度也有提升. Faster browser navigation with improvements to back and forward button performance.

junk，ragged，ratty，scrap，rubbishy ；

[例句] 这栋破烂的老房子不适合人居住. The broken - down old house was not fit for human habitation.

[例句] 他们褴褛的衣服和破烂的家具显出他们的贫穷. Their tattered clothing and broken furniture indicated their poverty.

tumid，[医] oncotic，tumescent，turgescent，swoln ；

[例句] 他轻轻地揉着肿胀的鼻子. He gently rubbed his swollen nose.

[例句] 腮腺肿胀的其它原因是化浓性腮腺炎. Other causes of parotid swelling are suppurative parotitis.

difficult，hard，burdensome，formidable，rough ；

[例句] 超级大国开始着手削减核武器库这项更为艰难的工作。 The Superpowers turned to the harder task of cutting their nuclear arsenals.

[例句] 这一年半以来，她度过了一段非常艰难的时期。 She's had a really tough time the last year and a half.

hasty and careless，illegible，sloppy，slovenly，crabbed ；

[例句] 这封信一定是弗兰克写来的, 我认得他那潦草的笔迹. This letter must be from Frank; I recognized his scrawl.

[例句] 辨认他的潦草的字迹叫人头痛. It is a headache to decipher his sloppy penmanship.

abiogenetic，accidental，[医] adventitious，chance，adventive ；

[例句] 这是一桩偶发的事件. It was quite an accident.

[例句] 事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。 It became very clear that the incident was not just an aberration, it was not just a single incident.

abrupt，precipitate，[法] sudden，snap，dead ；

[例句] 突然的拉力使得整只船剧烈颤动。 The whole ship shuddered and trembled at the sudden strain.

[例句] 突然的噪声把鸟群惊飞了. The sudden noise frightened the birds to take wing.

compensatory，complementary，[计] expletory，supplementary ；

[例句] 新补充的部队已送往前线. New relays of troops were sent to the battle front.

[例句] 这两种方法是互为补充的而且都是有价值的. The two viewpoints are complementary and both approaches are of interest.

aching，atingle，[医] algesic，algetic，achy ；

[例句] 对疼痛的耐受程度因人而异，差别很大。 The levels of tolerable pain vary greatly from individual to individual.

[例句] 我们无法直接度量出疼痛的程度，而只能是作出估计。 We cannot measure pain directly. It can only be estimated.

excess，extra，[医] epactal，supernumerary，added ；

[例句] 高血压会给心脏增加额外的负担。 High blood pressure imposes an extra load on the heart.

[例句] 额外的收入意味着菲莉帕可以把房租的钱存起来。 The extra income has meant Phillippa can tuck away the rent.

degenerative，transmutative，[医] alterant，alterative ；

[例句] 变质的油会破坏味道。 Rancid oil will taint the flavour.

[例句] 他们用变质的乳酪作捕鼠夹的诱饵. They bait the mousetrap with stale cheese.

careful，cautious，[法] deliberate，prudent，well-advised ；

[例句] 司法部在将非暴力犯罪者投入监狱前必须经过审慎的考虑。 The judiciary must think very hard before jailing non-violent offenders.

[例句] 时机成熟辩护理由通常反映的是审慎的考虑. Usually, however , the ripeness defense reflects prudential considerations.

concentrated，crowded together，[经] intensive，dense，serried ；

[例句] 他们听到密集的枪炮声。 They heard thousands of gunshots.

[例句] 该市镇处于密集的炮火之下。 The town is under heavy artillery fire.

agnate，akin，connate，consanguineous ；

[例句] 未成功的杂交组合都属非同族的两个种. The unsuccessful crosses involved two species belonging to different series.

[例句] 你的堂兄弟和你是同族的. Your cousins are akin to you.

pneumonic，pulmonary，[医] pneamonic，pneumal，pulmonic ；

[例句] 潜水学校获得潜水用水肺的特许经营权. The diving school has acquired a franchise for scuba equipment.

[例句] 胃胀使膈升高也会减少肺的容积. Gastric distention may also reduce lung volume by elevating the diaphragm.

alike，ditto，equal，like，one ；

[例句] 这份报社的工作让我日复一日地做着同样的事。 The newspaper job had me doing the same thing day after day.

[例句] 再给罗杰来一杯，伊莫金，我也再来一份同样的。 Give Roger another pint, Imogen, and I'll have the same again.

alternate，alternating，metagenic，alternant，commutative ；

[例句] 眼下，我们正处于秋冬交替的时候。 Right now we are in the changeover period between autumn and winter.

[例句] 那是晴雨天交替的一周. That was a week of alternate rain and sunshine.

anaesthetic，anesthetic，narcotic ；

[例句] 该手术可以在局部麻醉的情况下实施。 The operation can be done under local anaesthesia.

[例句] 别担心, 做手术时会让你的狗麻醉的. Don't worry. Your dog will be put to sleep for the operation.

newborn，palingenetic，[医] neoformative，neogenetic，neonatal ；

[例句] 结果, 新生的食蚁兽幼兽往往被它的父母遗弃. As a consequence, newborn baby anteaters are often discarded by their parents.

[例句] 这些新生的血管将开始变形. These new blood vessels will begin to degenerate.

mock，simulant，[计] mimetic，simulated，simulative ；

[例句] 我们收到你的智能模拟的限制, 队长. We're all painfully aware of your AI's limitations, captain.

[例句] 在电磁暂态计算中,变压器是较难模拟的元件之一. It is very complicated to model transformer in transient calculation.