There are a number of push and pull factors.

有许多推拉因素。

So we have to look at the pull factors.

所以我们必须看看拉动因素。

Yet there are pull factors, too.

然而，也有拉动因素。

Is it actually true that they are acting as a sort of a pull factor?

他们真的起到了某种拉动因素的作用吗？

And then the existence of the facilities sort of as a pull factor, drives the production of more ethane.

然后设施的存在有点像拉动因素，推动了更多乙烷的生产。

He warned, however, that the United States cannot rely solely on foreign partners to solve the " pull factors" created by the broken U.S.immigration system.

然而，他警告称，美国不能仅仅依靠外国伙伴来解决美国支离破碎的移民体系造成的" 牵引力因素" 。

Minister Piantedosi has proposed a decree to limit the possibility of NGOs to operate in the territorial borders, because there is this assumption that they still act as a pull factor for migration.

皮安特多西部长提出了一项法令， 以限制非政府组织在领土边界开展活动的可能性，因为有这样一种假设， 即它们仍然是移民的拉动因素。