The spider also USES its third pair of legs in the mating display, raising them to show a brush of black hairs and white tips.

这蜘蛛还会在求偶大会中使用第三对后肢，像秀黑发梳、白色梳齿一样升高。

youdao

By raising your legs slowly and lying on your back, you cannot sink into quicksand.

如果陷入流沙中的话，慢慢地举起腿，躺在背上就不会下沉。

youdao

By raising your legs at the top of each swing, you can raise the overall center of mass of your body, effectively raising the height of your swing.

通过每次在当秋千时的最高点伸直你的腿可以使你全身的质心升高，这样就能有效地增大你晃动时的高度。

youdao

He seemed to move in slow motion, swinging his legs out in parallel to seek a ledge, pulling to a crouch, raising one graceful arm to grab a hold.

ECONOMIST: John Bachar, free-climber, died on July 5th, aged 52