n. (因苦痛或愤怒)龇牙咧嘴;露着牙齿笑。 sardonic grin冷笑。 on the (broad) grin 笑嘻嘻，露齿而笑。 vi. 露出牙齿 (with); 露着牙齿笑 (at)。 grin and bear it 苦笑着忍受，逆来顺受。 grin like a cheshire cat 咧着嘴傻笑。
a facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement 同义词：smile, smiling, grinning,
to draw back the lips and reveal the teeth, in a smile, grimace, or snarl
例句与用法
1.
Reynolds grinned and boomed at me . 雷诺兹咧着嘴笑笑，对我喝了一声。
2.
Higbee went blank and then grinned . 希格比愣了一下，然后咧开嘴笑了。
3.
He gave his familiar, twisted grin . 他露出了熟悉的撇嘴露齿的笑容。
4.
The president broke into a sly grin . 总统突然咧着嘴狡猾地笑了笑。
5.
Charlie flashed us a familiar grin . 查理笑逐颜开，神情一如往昔。
6.
With a nasty grin on his face he took out a knife . 他狞笑着掏出了刀子。
7.
The railwayman grinned at me . 铁路人员对我露着牙齿笑了。
8.
Davis said with his habitual guilty grin . 戴维斯带着一种惯常的内疚的样子笑着说。
9.
I had an idea that i was grinning from ear to ear . 我还以为我是笑得合不拢嘴了呢。
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