length overall of the

These produce oil which flows along the length of the hair and the health of the root determines the overall health of the strand of hair.

这些会分泌油脂，油脂顺着头发流动，而发根的健康程度决定了该缕毛发的总体健康。

Overall, researchers didn't find major differences between the four groups, but the length and severity of colds was slightly worse among patients who didn't receive pills.

从总体上看，研究人员并未发现这四组病人之间有重大差异，但没有服用药片的病人的感冒病程略长、病情也略为严重。

A progress bar can set expectations for the length of process, give a preview of the overall process, and keep users informed about how far they've progressed in the prescribed flow.

进度条可以让用户预估整个流程的长度，对于全部流程有个预览，并时刻告诉他们在整个流程中已经完成多少了。