Despite the mandatory conversion into renminbi, many people held onto their dollars, or bought them at inflated exchange rates, if they could find a seller at all.

尽管有着强制兑换的命令，但许多人坚持持有自己的美元，或以极高的汇率买入它们——如果能在任何地方找到销售者的话。

youdao

Mandatory seat-belt laws and their enforcement have been shown to be very effective at increasing seat-belt wearing rates.

已经证明，强制性安全带法律及其执法情况对于提高安全带使用率十分有效。

youdao

If you are not using a referenced tool then amanual spreadsheet that shows the competitors' rates on both their direct channels and the major OLTAfor the next 21 days is mandatory.

如果没有使用参考工具，则必须手工建立一份数据表，显示竞争对手在未来21 天内在其官方渠道和主要OLTA 上的价格。

youdao

What's more, in my experience, many public funds fail to submit their reported rates of return to the sorts of audits and verification money managers in the private sector regard as mandatory.

FORBES: Financial Watchdog