重点讲解：
1. in a bid to do sth.
努力；尝试；企图；
eg. What's more, in a bid to cut their costs, cios have loosened up policies to allow employees to bring their personal devices to work.
此外，为了削减开支，首席信息官们放宽了政策，允许员工携带个人设备上班。
eg. Several other countries have announced they would also dispatch ships to the region, including the european union, in a bid to reduce pirate attacks.
欧洲联盟和其他几个国家也宣布，他们会派遣船舰到该区域，争取减少海盗攻击。
2. hang on
（面对困难或阻力）坚持不懈，不泄气；
eg. Without the support of my parents I would have probably cracked up completely. But I managed to hang on.
假如没有我父母的支持，我可能已经彻底垮掉了。但我还是坚持了下来。
eg. You're not sure how much longer you can hang on.
你不知道自己还可以撑多久。
3. be to do sth.
想，打算；
eg. If we are to be there before ten, we’ll have to go now.
如果我们要在十点前到，我们现在就得走。
eg. Two leading law firms are to prepare legal actions against tobacco companies.
两家很有名的律师事务所准备向烟草公司提起诉讼。