Those who began smoking within a month of the study's start were four times as likely to be depressed at the study's end than those who did not begin smoking.

那些在研究开始后一个月内就开始吸烟的人在研究结束时抑郁的可能性是那些没有开始吸烟的人的四倍。

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Getting back into exercise can be a challenge in the best of times, but with gyms and in-person exercise classes off-limits to many people these days, it can be tricky to know where to start.

在境况最好的时候，重新开始锻炼身体也可能是一项挑战，但如今许多人都无法去健身房或参加面授的健身课程，就更是连从何处入手都很难知道。

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Well before a championship, sports scientists and coaches start to prepare the athlete by developing a 'competition model', based on what they expect will be the winning times.

早在冠军赛之前，体育科学家和教练就开始建立“竞赛模型”来为运动员备赛，这种模型是基于他们对胜利时刻的期望。

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He always puts his right ski boot on first, he touches his helmet and goggles two dozen times before leaving the start house.

VOA: standard.2010.02.09

I'm going to start somewhere near the middle of the code. Again, a lot of times, people don't do that.

我会在代码中间的某个位置开始,再说一次，很多时候人们不会这么做。

麻省理工公开课 - 计算机科学及编程导论课程节选

There was also an advisory that the start and finish times of the shorter runs be moved to earlier in the morning, before the really hot weather bore down on runners.

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The high stakes dictate the 4 a.m. start time at the Times Square shop.

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The American was forced to start the tournament three times after wind halted his first two attempts.

CNN: January 9, 2013 -- Updated 1219 GMT (2019 HKT)