More happily, raising our hand is also the symbol of knowing the correct answer in grade school, or signaling our willingness to volunteer for activities as we get older.
让人轻松点的例子也有：在学校里举手表明知道正确的答案。长大后，举手表示志愿参加某项活动。
2
A person who holds a hand over his mouth when he is talking is signaling that he is lacking in confidence.
一个人如果在谈话时总是用一只手捂着嘴，这就表明他缺乏自信。
3
A person who holds a hand over his mouth when he is talking is signaling that he is lacking in confidence.