Yet without an international deal that sets targets for all, no one nation can be certain that others will pull their weight.
然而，没有一个国际协议为各国设置目标，没有一个国家能确定其他国家会尽心尽力。
One end of the rotation axle is connected with an electromagnet by a pull rod and a weight rod.
转动轴的一端通过拉杆和重锤杆与电磁铁相连。
One end of the rotation axle is connected with an electromagnet by a pull rod and a weight rod.
转动轴的一端通过拉杆和重锤杆与电磁铁相连。
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