Seromucus
血清粘液
🗣️ 情景例句
You and I are very busy these days.
这些天来我们俩都很忙。
You're big and fat, and I'm little and skinny.
你虽然大而胖，但我却小而瘦。
It has been found that certain bats emit squeaks and by receiving the echoes,
人们发现，某些蝙蝠能发出尖叫声，