更好

Keep your feet under your desk;do not let them protrude into the aisle.

把脚放在书桌下，不要伸到走道上。

Always bend the knees when bending or lifting; always hollow the back when kneeling; when carrying, distribute weight evenly; when standing for long periods stand with your feet slightly apart; when pushing or pulling try to keep your back straight and take the strain on your arms.

总是弯曲的时候膝盖弯曲或解除；总是空心的，当回跪；当携带，重量分布均匀；当长时间站立站在你的脚稍离；当推或拉，以尽量保持你的背部平直，采取应变对你的武器。