Objective: To explore the safe zones of operation in head and neck of radius.

目的：探讨桡骨头颈部手术的安全区域。

youdao

Again the hair is divided into zones or layers and cut in a circular pattern around the head.

头发再次分区域或分层并以一种环形的方式围着头部剪。

youdao

Fear rears its head when people attempt to move beyond their comfort zones.

当人们企图走出自己的“舒适地”时，恐惧会抬头。

youdao

Or how about the experiment suggested by Sir Peter Newsam, a former head of London University's Institute of Education, for initiative-free zones, where head teachers are left to run schools without constant meddling from local authorities and ministers?

ECONOMIST: Schools