Bilayer
[机] 双分子层
🗣️ 情景例句
a portrait of the United States--
一幅美国的剪影--
It's available in a variety of sizes at convenience stores and department stores as well.
有各种大小型号，在便利商店和百货公司均有。
The children are no longer young, and they know who Father Christmas really is.
孩子们不小了，他们知道真正的“圣诞老人”是谁。