He cited his heavy workload as the reason for his breakdown.

他说繁重的工作负荷是导致他累垮的原因。

《牛津词典》

There is reason to suspect, despite industry denials, that it also contaminates groundwater; and the heavy trucking required for fracking inflicts major damage on roads.

尽管该行业予以否认，我们有理由怀疑，这项技术同时也污染地下水，还有，水力压裂需要的重型卡车运输也给道路带来严重的破坏。

youdao

That's part of the reason Dr. Spock, Dr. Kushi and others have advocated for diets heavy on plants and free of processed foods.

这就是Spock博士，Kushi博士和其他专家提倡多植物无加工食品饮食的部分原因。

youdao

Good question. I think part of the reason for more blacks low reading skills is, to do with the history of being heavy slaves.

好问题,我认为黑人阅读能力差的部分原因是,他们经历了较长时间的奴役史。

麻省理工公开课 - 媒体、教育、市场课程节选

These provide access to the central bore of the well underneath most of the heavy valves which should have closed off the flow of oil, but for some reason did not.

ECONOMIST: The Gulf oil spill

Regardless of the reason, those with income-heavy portfolios could be in for a shock.

FORBES: Second Quarter, 2012 Market Review & Outlook

Corrections officials were blunt in explaining their reason for finally inviting reporters, albeit without cameras, to peek behind the heavy metal gates for the first time since the penitentiary opened 13 years ago.

CNN: Reporters get first look inside mysterious Supermax prison