Polyspermism
[医] 精液过多, 多精授精
🗣️ 情景例句
When was it built?
它是什么时候建造的？
How long has it been since you've heard from your uncle?
自从你听到叔叔的消息有多长时间了？
Historians have long been puzzled by dots, lines and symbols which have been engraved on walls, bones, and the ivory tusks of mammoths.
长期以来，历史学家一直对雕刻在墙壁上、骨头上、古代长毛象的象牙上的点、线和形形色色的符号感到困惑不解。