expression mark

例句：

1. 1. The expression on his face said it all.
   他脸上的表情说明了一切。
2. 2.She used an expression mark to indicate that she was confused.
   她用一个表情符号来表示她感到困惑。
3. 3. The new software adds a variety of expression marks for better communication.
   这款新软件添加了多种表情符号，以便于更好的沟通。