sporadic是什么意思？

sporadic

英[spəˈrædɪk] 美[spəˈrædɪk, spɔ-]

• adj. 不定时发生的，时有时无的，零星的，分散的，哩哩啦啦；

副词：sporadically;

例句

• Apomixes is divided into three types, including sporadic, constant and periodic. 孤雌生殖有偶发性 、 经常性、周期性三种类型.
• We know how Sporadic E affects VHF radio signals. 我们知道怎么分散E影响VHF无线电信号.
• In its common'sporadic " form, Creutzfeldt -- Jakob disease is rare in people under 50. 克雅氏病通常以“个例 ” 形式而且在50岁以下的人中偶发.
• There were reports of sporadic fighting in the streets. 有报道说街上有零星战斗.
• Relative concentrations of molecular and metallic ions in midlatitude intermediate and sporadic - E layers. 在 中纬度 中和时现E层分子和金属离子的相对浓度.
• Medullary carcinomas can be sporadic or familial. 髓样癌可以是散在单发,也可以是家族性发病.
• Most of the smaller hornblendite bodies contain about 5 - 10 percent magnetite, with only local sporadic enrichment. 在小的角闪岩体中,磁铁矿可占510%, 仅有局部的散染状富集.
• Most of the multiple glomus tumors are sporadic but are hereditary or congenital. 大部分多发性脉络球瘤为偶发性,但亦有少部分属于遗传或先天性.
• Suddenly , a sporadic cannonball bombed in the battle field. 敌人已经在城下骂阵了,我们却还是按兵不动.
• Commonly a sporadic disease, actinobacillosis occasionally occurs in high incidence. 放线杆菌病通常是一种散发性疾病, 但偶尔也有高的发病率.

柯林斯高阶英汉双解学习词典释义

• ADJ-GRADED
  间断发生的;零星的
  Sporadic occurrences of something happen at irregular intervals.
  例句
  ...a year of sporadic fighting over northern France... 法国北部发生零星战斗的一年 The sound of sporadic shooting could still be heard. 仍能听见零星的枪声。

英汉词典释义

• adj.
  偶尔发生的；间或出现的；阵发性的；断断续续的
  There were reports of sporadic fighting in the streets. 有报道说街上有零星战斗。

英英词典释义

• Adjective
  1. recurring in scattered and irregular or unpredictable instances;
  "a city subjected to sporadic bombing raids"

行业词典

• 医学： 散在的，散发的：非广泛扩散或流行的，仅偶然或散在发生的；