But it was previously done using a ratcheting mechanism which required heavy solid parts such as a clutch.
但以前是用棘轮机构来实现的，并且需要重而坚固的部件，比如离合器。
Modern Web design is using the float property more and more to obtain page layouts previously done using tables.
现代的Web设计开始越来越多地使用浮动属性来获得之前使用表实现的页面布局。
Thus, e.g., the textile industries and the garment industries where not substitutes for activities of artisans who had previously done spinning, weaving and tailoring for the common man.
例如，纺织业和成衣业根本不是先前那种为普通人纺线、织布、裁剪的手工匠生产活动的替代产物。
Many older factories have been introducing automatic machinery to perform tasks previously done by workers.
许多老工厂采用自动化机械来完成过去由工人干的活。
All work previously done was looking at patients, animal models or cell lines after the tumor already developed.
我们以前做的所有的工作都是针对已经得了肿瘤的病人、动物模型或肿瘤细胞系。
All work previously done was looking at patients, animal models or cell lines after the tumor already developed.
我们以前做的所有的工作都是针对已经得了肿瘤的病人、动物模型或肿瘤细胞系。
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