Some young people suddenly become self-conscious and tongue-tied in early adolescence.

一些年青人在青春期早期突然变得害羞结舌。

The need for sleep is even greater during adolescence than at younger ages.

青春期对睡眠的需要甚至比幼时更甚。

When the child reaches adolescence, this bond between mother and child faces its ultimate test.

当儿童成长进入青春期，母子间的亲情关系会面临最严重的考验。