"A sweet temper" is a figurative expression, but "sweet coffee" is not. "甜蜜的性情"是个比喻的说法,而"甜咖啡"则不是。
The third chapter studies simply the restitution of the sovereign rights over territorial waters, relating to the consciousness of sovereign rights over the territorial waters. 第三章简单地考察了中国领水主权的恢复情况,其中涉及到中国领水主权意识的产生问题。