Smoking a lot of cigarettes can harm and even kill over a long period of time.

长期大量吸烟会危害身体健康，甚至导致死亡。

youdao

Trackers, which are ongoing projects that look at trends or customer satisfaction over a long period of time.

一个正在进行的项目——“追踪者”，在研究很长一段时期内的趋势或客户满意度。

youdao

Diabetes is caused by a group of metabolic disorders in which there are high blood sugar levels over a long period of time.

糖尿病是由一组代谢紊乱引起的，代谢紊乱后，血糖水平长期偏高。

youdao

Medical experts say small amounts of carbon monoxide over a long period of time can greatly harm an unborn baby.

VOA: special.2010.02.02

So, the process of developing a vaccine occurred over a long period of time.

疫苗的发展经历了很长一段时间

耶鲁公开课 - 生物医学工程探索课程节选

or if it's over a long period of time and it's an ongoing situation that you want to get rid of.

或者是一件持续了很久的事，你特别想摆脱它。

I'm afraid of 课堂 - SpeakingMax英语口语达人

And there are ways to spread that out over a long period of time.

CNN: Giuliani's responses at the CNN/YouTube debate

Children are most vulnerable in areas where conflicts have raged over a long period of time.

FORBES: For Child Soldiers, Every Day Is A Living Nightmare

The products "could cause serious health problems if consumed over a long period of time, " he said.

CNN: FDA blocking import of 5 species of fish from China