Fbk
abbr. fast buck 投机所赚的钱，轻易得来的钱; flat back (lumber) 平板龙骨
🗣️ 情景例句
But who's going to pay for all of this?
但谁来为这些付钱呢？
Why not go out for a walk?
干吗不出去散步？
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。