Preformation membranes
[医] 预成膜
🧩 词语组成解析
n. 预先形成\\n[医] 先成说, 预成说
n. （动物或植物体内的）薄膜( membrane的复数形式 ); 隔膜; （可起防水、防风等作用的）膜状物
🗣️ 情景例句
You didn't say the magic words.
你没有念魔语。
Here is a copy of itinerary we have worked out for you and your friends.Would you please have a look at it?
这是我们为你和你的朋友拟定的活动日程安排。请过目一下，好吗？
It's a pencil-box.
一只铅笔盒