[例] Many companies became followers seeing KFC’s success.
fluctuate (v.) rise and fall rapidly波动
[例] Workers certainly don’t want their pay to fluctuate wildly.
[同义词] vacillate,waver, vary
fluctuation (n.) sudden movement波动
[例] It is difficult to estimate the price fluctuation of the market.
FOB (free on board) 离岸价
follow-up (n.) an activity done to add to or continue something done earlier后继（产品）
[例] The software was a successful follow-up to the original product.
force majeure (n) an unexpected and unavoidable event that causes or allows a contract to be changed or cancelled if it has a forcer majeure clause 不可抗力
[例] Due to force majeure , this deal turned out to be a great failure.
[同义词]Act of God
