在北美，南美以及其他一些地方生产的精子和克隆动物胚胎，其在国际范围内的交易已经无法加以有效监管。
The international trade in semen and embryos from cloned animals created in north and south America and beyond was effectively impossible to police.
由于没有基础市场报价，与这些股票相关的期权也无法交易。
Options traded on these shares also cannot trade - there is no underlying market to quote them against.
这宗预定在未来两周内交由股东投票的友好交易，无法与皮博迪的敌意收购同时推进。
That friendly transaction, due to go to a shareholder vote within the next fortnight, cannot proceed in tandem with Peabody's unfriendly one.
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