The change was not mandatory, and the spokesman would not comment on Air France's failure to follow the advice.

这种改变不是强制性的,所以这位发言人没有就法航没有采取此项建议作出任何评论。

youdao

It's not a diet to stick with, but a mandatory nutrition lecture offers solid real-world advice.

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This agency would derive its funding from mandatory fees paid by any firm that trades or sells derivatives, securities, bonds, investment advice or commodities contracts.

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