George struggled wildly, going under and resurfacing at regular intervals.乔治疯狂地挣扎，不断在水面上浮浮沉沉。Make a point of backing up your files at regular intervals.一定要定期备份文件。The cartridge must be replaced at regular intervals.弹药必须定时...
Precipitates are usually collected by centrifugation at intervals.常常是用离心法分段收集沉淀的.Try to get into the habit of eating at least three small meals a day, at equally spaced intervals.尽量养成每天至少吃3顿小餐的习惯，而且每餐的间隔要相同。She began to ...
This artist carves in gold.这位艺术家雕刻黄金.When he was 16 when is ornery shoots carves the hero!当他十六岁时已是威名远播的射雕英雄了!He carves his figures from white pine...他用白松木雕刻出那些人偶。He carves his figures from white pine.他用白松木雕刻出那些人偶。...
结束了工具匠的学徒期以后，他当上了经理。After serving his apprenticeship as a toolmaker, he became a manager.他的学徒期已满.His apprenticeship was behind him.这是一段不同寻常的学徒期.It was an unusual apprenticeship....