🧩 词语组成解析
a. 多音的, 有多种声音的
letter
['lɛtɚ]
n. 信;证书，许可证;字母，文字;字面意义;
vt. 用字母标明;写字母于;加标题;
vi. 写印刷体字母;
🗣️ 情景例句
Yeah, he's fine.
是的 ，他不错。
Keep your mouth shut and your eyes open.
要多看少说。
The tunnel would be well-ventilated if tall chimneys were built above sea level.
隧道就具备了良好的通风条件。