China has steadfastly resisted any mandatory quotas on carbon emissions .

中国一直坚决抵制任何强制性的碳排放限额。

Such action could involve a move to mandatory quotas .

这样的举措可能涉及到指派强制的配额。

The ethics of mandatory testing are frequently debated .

强制检测的道德性经常受到争议。

Increasingly , these procedures are mandatory .

这些程序逐渐成为强制执行的措施。

But mandatory sentencing laws gave him no choice .

但具有强制力的刑期法让他别无选择。