to make our mouth curve upwards, often in a way that our teeth can be seen, to show that we are happy or amused

微笑

to raise one's hand and move it from side to side to greet someone or attract their attention

挥手, 招手

to touch someone else's lips or other body parts with one's lips to show love, sexual desire, respect, etc.

亲吻, 接吻

to make happy sounds and move our face like we are smiling because something is funny

笑, 开怀大笑

to drop one's eyebrows, chin, or gaze to express sadness, disapproval, or shame, or to show less intensity or hostility in a facial expression

降低, 减少

to bend one's head downward, particularly as an act of agreement, greeting, etc.

倾斜, 低头

to draw back involuntarily, often in response to fear, pain, embarrassment, or discomfort

退缩, 畏缩

to make a kissing gesture with one's hand or lips and send it toward another person as a sign of affection
to laugh in a light, silly, or often uncontrollable way as a result of nervousness or embarrassment

咯咯笑, 傻笑

to press one's teeth against the lip as a reaction to emotion, pain, or to prevent oneself from saying something
to unexpectedly open one's mouth wide and deeply breathe in because of being bored or tired

打哈欠, 张嘴

to cause surprise, curiosity, or mild shock among people due to something unconventional, unexpected, or controversial
