They have an extra heavy burden to bear.

他们需要背负更重的担子。

youdao

Its extra heavy duty bearings are designed to maximize its operational life.

其额外的重型轴承的设计最大限度地发挥它的运行寿命。

youdao

You may have noticed that you feel extra heavy, lethargic, that you feel gravity’s pull is greater.

你可能已经觉察到那时候的你感到非常沉重，昏昏欲睡，感觉地心引力都变得更大。

youdao

Discounts for big users are tiny because of the heavy extra costs imposed by the government to subsidise renewable energy sources (due to provide 20% of capacity by 2020) and to reduce the life of nuclear power plants to 32 years (from 50 years).

ECONOMIST: German business

The Wimbledon doubles title had also been at the expense of Huber and Black in a 6-1 6-2 thrashing and the Americans were similarly dominant in front of a thin crowd at Arthur Ashe Stadium as the final grand slam of the year stretched into an extra day following the heavy rain delays of late last week.

CNN: 'Apologetic' Serena wins doubles with Venus

From Monday the timetable will change to allow for the extra time drivers need during heavy traffic.

BBC: Jersey's bus company in timetable blunder