Bird's sign
[医] 伯尔德氏征(肺棘球蚴病的听诊体征)
🧩 词语组成解析
🗣️ 情景例句
so I wouldn't lose them.
免得我弄丢了。
In secondary school, children get more advanced knowledge.
在中学，孩子们得到更高深的知识。
Then we played some games.
接着我们做游戏。