We may run into heavy weather when we learn calculus at first.

我们刚开始学微积分的时候可能会感觉到困难重重。

youdao

The delay was caused by heavy weather and was beyond our control.

延迟是由恶劣天气造成的，我们无法控制。

youdao

Securedwatertight doors and lashed up lifeboats for heavy weather.

紧闭水密门，绑紧救生艇，预防恶劣天气。

youdao

The causes of heat stress include wearing heavy clothing, physical work or exercise, hot weather and high humidity.

VOA: special.2011.08.09

Severe winter weather, heavy rains and landslides are believed to have destroyed much of the butterfly population.

VOA: special.2010.04.27

The weather is warm. They do not have to wear heavy clothes to keep warm.

VOA: special.2009.06.22

You said that the onshore skimming activities have been significantly disrupted by this heavy weather.

WHITEHOUSE: Press Briefing

Prior to Fletcher's introduction, Scotland had made heavy weather of breaking down stubborn opponents.

BBC: SPORT | Football | Internationals | Scotland | Scotland battle past Lithuania

At times Edinburgh made heavy weather of a team who were missing many of their frontline stars.

BBC: Edinburgh 32-16 Ospreys