重點(diǎn)講解：
1. back up 支持，證實(shí)（某種說(shuō)法）；
Radio signals received from the galaxy's centre back up the black hole theory.
從該星系中心收到的無(wú)線電信號(hào)證實(shí)了黑洞理論X#)eT8TlzuIo[。
2. tell apart 區(qū)分；區(qū)別；辨別；
It's difficult to tell them apart.
很難把他們區(qū)分開(kāi)來(lái)43GjMsK.T[p)26]nxO8。
3. on top of 另外；加之；除…之外(還)；
On top of that, I've got one extra bit of good news I think you might want to hear.
除此之外，我還有一個(gè)你想要聽(tīng)到的好消息#!vD3^*L0YBd!。
4. encourage sb. to do sth. 鼓勵(lì)；激勵(lì)；
Relocation expenses were paid to encourage senior staff to move to the region.
公司發(fā)放了安置費(fèi)來(lái)鼓勵(lì)高級(jí)員工搬到這個(gè)地區(qū)xur;t2(T])Z@ddwlBg3&。