Atoms of iron in the nail combine with atoms of oxygen from the air to form molecules of iron oxide, or rust.
钉子里的铁原子与空气中的氧原子结合后形成氧化铁分子，也就是锈。
2.blowing up 气泡
Other than blowing up a tyre I hadn't done any car maintenance.
除了给轮胎充气外，我没做过任何汽车保养。
3.be projected to 预计
By 2017, it's projected to be at 26% and that's just penetration in e-commerce.
但到2017年，这个比例预计将达到26%，这还只是它在电子商务领域的渗透程度。
4.in a sense 在一定程度上
In buying your children all these things, you are in a sense buying them off.
给孩子买下所有这些东西，从某种意义上说你是在收买他们。
5.aspire to 渴望
For us, it's something that we may aspire to but can never attain.
对我们来说，那是可望而不可即的。
