1.on track走上正轨
Portals attempt to create what they call sticky content to keep a user as long as possible.
门户网站试图创建一些他们所说的粘性内容来尽可能长地留住用户aw^5KX^JVt09。
2.be subject to受支配；从属于
Although these targets would not be internationally binding, they would be subject to outside verification.
虽然这些目标不具有国际约束力，但它们将受到外界监督[DJlyE)@+uNccP。
3.draw on利用；吸收
Some people speculate that one could draw on this vacuum energy for an unlimited supply.
有些人推测可以利用这种真空能量来获得无限的能量补充T]d~*h3=1e_。

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