As the labor progresses, those endorphins will rise to help her with a potentially long labor.

随着分娩的进行，那些内啡肽会上升， 以帮助她完成可能较长的分娩。

It has been a running joke in my family that it's hard to hold anyone's attention for too long. Labor was no exception to that rule.

这件事后来成了家里常提的笑话，它证明要长时间吸引别人的注意力是很困难的，分娩也不例外。

Through an American representative in Mexico, Jackson had long and anxiously labored, by means none too nice, to wring from the Mexican republic the cession of the coveted territory.

通过一位驻墨西哥的美国代表， 杰克逊长期以来一直焦急地努力，以不太友善的方式从墨西哥共和国手中夺取这块梦寐以求的领土。