Bicylinder
双柱面透镜
🗣️ 情景例句
Or helped you?
还是帮助你？
I'm glad to hear about your promotion.
我很高兴听到你升迁的消息。
All the thing I had packed so carefully were soon in a dreadful mess.
所有细心包装好的东西一会儿工夫就乱成一团。