periodically

Invading woody vegetation, especially of the same species, should be controlled periodically to prevent confusion.

入侵的木本植物, 特别是同一种类的, 应当定期地除去,以防止混杂.

Villagers'committees regularly or periodically make public the affairs of the village to the villagers.

村民委员会将村务定期或不定期地向村民公开.

The geyser erupts periodically.

间歇泉周期性地喷发.

Police were periodically patrolling the area.

警察定时在这一地区巡逻。

Violent winds periodically drive clouds of dust around Mars.

狂风间歇地席卷火星上的尘云.

Hurricanes periodically menace the Gulf Coast.

飓风常常威胁着墨西哥湾海岸.

Mount Baker periodically heats up internally.

贝克山有周期性内部发热现象.

Periodically, Churchill sinks into spells of depression.

邱吉尔的情绪会周期性落入低潮.

He drinks far more than she, and is periodically rebuked.

他喝酒比她厉害得多, 为此,有时受到她的责怪.

Inspectors periodically check wiring, heating plants and chimneys.

检查员定期检查电线系统, 暖气设备和烟囱.

Periodically , the lamellae become enlarged, forming flattened, membrane-enclosed vesicles called thylakoids.

片层周期性地扩展, 形成扁平的有膜为界的囊,称为类囊体.

Economic crises recur periodically.

经济危机周期性地发生.

Dynamic RAM's need to be refreshed periodically.

动态RAM则需要周期性地刷新数据.

Economic dislocations such as " the Panic of 1837 " occurred periodically during the 19 th century.

十九世纪曾周期性地发生象 “ 一八三七年恐慌 ” 那样的经济失调现象.

The simplest imposed conditions are those in which the loading is periodically and uniformly repeated.

最简单的加载情况是周期地、均匀而重复地施加的载荷.