Bcf
[医][=bacterial chemotactic factor]细菌趋化性因子
🗣️ 情景例句
The newspapers don't come out till about ten o'clock.
报纸要差不多十点钟才出来。
Grain by grain and hen fills her belly.
一粒一粒啄米，母鸡填饱肚皮。
Modern sculpture rarely surprises us any more.
现代雕塑不再使我们感到惊讶了。