Lef
[医][=leukokinsis-enhancing factor]白细胞移动增强因子
🗣️ 情景例句
But?
但是？
To squeal, to squeak
尖叫
They sting or bite without provocation; they fly uninvited into our rooms on summer nights, or beat ageist our lighted windows.
它们无缘无故地又叮又咬；夏天的晚上，它们未经邀请便飞到我们房间里，或者对着露出亮光的窗户乱扑乱撞。