Periston
聚乙烯基吡咯烷酮
🗣️ 情景例句
I don't like to travel during the holiday season.
我不喜欢在放假的季节去旅游。
I want to reserve a room.
我想预订一个房间。
may have left an automatic messenger behind to await the possible awakening of an advanced civilization.
很可能会在离开太阳系时留下自动化信息装置，等待先进文明的觉醒。