用作定语
▲～+n.
The boy disturbed the tranquil surface of the pond with a stick.那男孩用棍子打破了平静的池面。
The tranquil beauty of the village scenery is unique.这乡村有它独特的宁静之美。
There was a tranquil expression on his face.他脸上有一种安详自若的表情。
用作表语
▲S+be+～
The surface of the water was not tranquil during the storm.在暴风雨中水面不再平静。
