Bfk
abbr. Becker-Fulde-Keller theory 贝克尔-富尔德-凯勒理论; bovine fetal kidney 牛胎肾
🗣️ 情景例句
they insisted that I stay.
他们坚持要我留下来。
Do you have your driver's license?
你有驾驶执照吗？
If, at the time, the British had not feared invasion, it would have been completed.
如果不是因为那时英国人害怕入侵，隧道早已建成了。