| 单词 | 经常发生 |
| 释义 | 〔housebreak〕a neighborhood in which housebreaks are a common occurrence.经常发生侵入民宅事件的住宅区〔senopia〕Improvement of near vision sometimes occurring in the aged because of swelling of the crystalline lens in incipient cataract.老年视减退现象：经常发生在老年人中的由于早期白内障的晶状体肿胀而产生的近距离视力的增强〔infrequent〕Not occurring regularly; occasional or rare:不经常的：不经常发生的；偶然的或罕见的：〔superfetation〕Formation or development of a second fetus when one is already present in the uterus, occurring normally in some animal species.异期复孕：一个胎儿已在子宫内时另一个胎儿的形成或生长，在一些动物种类中经常发生〔native〕Food shortages and starvation are endemic in certain parts of the world.食物短缺和饥荒在世界的某些地区经常发生。〔usual〕These adjectives apply to what is expected or familiar because it occurs frequently or recurs regularly.这些形容词是指其事是可预见的或熟悉的，因为它是经常发生的或有规律地发生的。〔chronic〕Lasting for a long period of time or marked by frequent recurrence, as certain diseases:慢性的：延续很长时间或经常发生的，如某些疾病： |
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