1. She grinned her appreciation of my help.
    她露齿一笑表示感激我的帮助。

2. grin

2. He grinned his approval.
    他用一笑表示同意。

1. She grinned foolishly at him.
    她咧着嘴对他傻笑。

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1. He had a broad grin on his face.
    他满脸笑容。

1. 透镜：并通过算法计算出光纤插针端面的投影面积;再由给定的数学模型计算出光纤插针的相位,据此由控制系统对光纤插针进行旋转调节,使光纤插针的斜端面与自聚焦透镜(GRIN)斜端面基本保持平行;

2. 公共查询·英语单词大全

2. 咧嘴而笑：giggle 咯咯地笑 | grin 咧嘴而笑 | grin from ear to ear 嘴咧得大大地笑

3. grin：graduated refractive index; 由渐变折射率

1. 露齿而笑；咧嘴大笑
    When you grin, you smile broadly.

    e.g. He grins, delighted at the memory...
           想到往事，他开心地咧嘴笑了起来。
    e.g. Sarah tried several times to catch Philip''s eye, but he just grinned at her.
           萨拉几次想引起菲利普的注意，但是他只是冲她咧嘴笑了笑。

2. 露齿的笑；咧嘴的笑
    A grin is a broad smile.

grin

    e.g. She came out of his office with a big grin on her face...
           她笑容满面地走出他的办公室。
    e.g. Bobby looked at her with a sheepish grin.
           博比望着她腼腆地咧嘴一笑。

3. 苦笑着忍受；默默承受
    If you grin and bear it, you accept a difficult or unpleasant situation without complaining because you know there is nothing you can do to make things better.

grin是什么意思

    e.g. They cannot stand the sight of each other, but they will just have to grin and bear it.
           他们连看对方一眼都不愿意，但是也只得默默忍受。

1. a facial expression characterized by turning up the corners of the mouth
    usually shows pleasure or amusement

    Synonym: smilesmilinggrinning

1. to draw back the lips and reveal the teeth, in a smile, grimace, or snarl