back-leg的意思|示意

To stand, you have to tense your leg muscles, and engage the muscles of your back and shoulders; while standing, you often shift from leg to leg.

要站起来，你必须使你腿上的肌肉拉紧，你背上和肩上的肌肉也要参与；站着的时候，你的腿常常会转来转去。

Most important, weak growth prepares the ground for a second leg down, back into recession — the "W-shaped" recession that may emerge in late 2010 or 2011 that markets seem to have forgotten about.

最重要的是，乏力的增长总是为第二轮下跌，也就是重回衰退预备场地——“W”型的衰退或许会在2010年或2011年出现，市场似乎已经忘记了这一点。

Peeling back his trouser leg, he showed the doctor the wound.

他把裤腿翻起来，给医生看伤口。

Bend the front knee, keeping the back leg straight, press the right heel down on the floor.

前腿膝关节弯曲，后腿保持绷直状态，右脚后跟贴紧地面并向下压。

If you have sciatica, this will be very painful, marked by a burning sensation or a feeling of electric shock down your leg or in your upper back.

如果你有坐骨神经痛，那么这会让你疼痛难忍，这个感觉类似于燃烧或者电击，会从你的腿一支传导到你的背部上方。

Use your leg muscles - not your back - to lift the object.

用你的腿部肌肉——不是背部——去抬起物品。