🧩 词语组成解析
a. 锯齿状的\\n[医] 锯齿状的
leaf
[lif]
n. 叶子;页;叶状的结构;金属薄片;
vt.& vi. 翻书（报）;
vi. 生叶;
🗣️ 情景例句
How long will this letter take to get there?
这封信需要多长时间到那儿？
Our foreign trade policy has always been based on equality and mutual benefit and exchange of needed goods.
我们的对外贸易政策一向是以平等互利、互通有无为基础的。
The dog's in the garden, too.It's running across the grass.
狗也在花园里。它正在草地上跑，