upper shift的意思|示意

For those who snore only when sleeping on their back, placing a pillow under their upper back may encourage them to change sleeping position and shift onto their side or front.

而对于那些仅在仰卧时才会打鼾的人，可以在他们的背部放上一个枕头，这样来促使他们改成侧睡或者俯卧。

Those who snore only when sleeping on their back, placing a pillow under their upper back may encourage them to change sleeping position and shift onto their side or front, 'says Dr Shneerson.

对于那些一平躺就打呼噜的人来说，他们可以将枕头垫在上背部，这样可以“迫使”他们在睡觉的时候调整睡姿。

Die match tolerances are to allow for shift in the upper die with respect to the lower die.

锻模的配合公差是为了允许上模能根据下模替换。