A2
[医] 主动脉第二声
🗣️ 情景例句
Many foreign friends used chopsticks when they visited China.
许多的外国朋友在访问中国的时候都使用筷子。
Don't forget to put stamps on the letter.
不要忘记在信封上贴邮票。
You may be interested in only some of the items.
你也许对某些产品感兴趣。