It says chickens have been genetically changed to be so huge that their legs cannot support them.

他们表示，鸡的基因已经发生巨大改变，小鸡的腿根本无力支撑身体。

She did not know if her legs would support her.

她不知道她的腿能不能支撑住她。

All dinosaurs have hip joints that support the legs more or less straight under the body.

所有恐龙都有髋关节，或多或少地支撑身体下方的腿。

They also needed new limb supports — a more robust humerus to support the arm, and a pelvic girdle to support the legs.

他们还需要新的肢体支撑——更结实的肱骨来支撑手臂，骨盆带来支撑腿。

When she lifted things her face went white and she had a way of sitting down suddenly after exertions, as if her legs would no longer support her.

每当她倒拿起什么东西时，脸色就要发白，而且用力过多就会突然坐下来，仿佛两腿支持不住似的。