Teenagers
n. 青少年（13至19歲, teenager的復數）
??? 情景例句
Let's get together and have a group study session.
咱們在一起組織一個學習小組吧。
I often study in the morning.
我常常在早上讀書。
The efficiency is greatly raised,and the intensity of labor is decreased.
工作效率大大地提高了，而勞動強度卻降低了。