He tried to use his own weight to push his attacker off but he was off balance.

他试图利用自己的重量推开袭击者，但他失去了平衡。

《柯林斯英汉双解大词典》

On average, a platypus eats as much food as half of its own weight every day.

一只鸭嘴兽平均每天要吃等于自己体重一半的食物。

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This is because, according to Archimedes' principle of displacement, floating objects displace their own weight in water.

这是因为，根据阿基米德的位移原理，漂浮物在水中会转移自身的重量。

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"There is a growing consensus that we as a nation need to recreate our communities and environments where healthy choices are easy choices and affordable choices. Agriculture Secretary Tom Vilsack -- who has talked about his own childhood struggles with weight -- agrees about the need.

VOA: special.2010.03.17

There are messaging boards and online meetings, members can start their own weight loss-centric blogs, and they can participate in weight loss challenges.

FORBES: Weight Watchers: The "Original" Social Networking Company

The AIRarm prototype is essentially a Packbot whose metal arm's been replaced with an inflatable version able to lift four times its own half-pound weight.

ENGADGET: iRobot's AIRarm prototype bot has an inflatable arm for manipulating objects, was built at DARPA's behest

In absorption mode, the cloth can hold 340 percent of its own weight -- compared to just 18 percent without the polymer's aid -- and when it warms up, it releases the collected moisture as clean and pure potable water.

ENGADGET