1、open up
（使）（地方、经济、兴趣领域等）开放
As the market opens up, I think people are going to be able to spend more money on consumer goods.
随着市场的放开，我认为人们将能够增加用于消费品的支出。
He said he wanted to see how Albania was opening up to the world.
他说他想看看阿尔巴尼亚是如何对外开放的。
（使）（机会、可能性等）出现；（使）产生
It was also felt that the collapse of the system opened up new possibilities.
人们也认为这一制度的崩溃带来了各种新的可能性。
New opportunities are opening up for investors who want a more direct stake in overseas companies.
希望更加直接地参股海外公司的投资者获得了新的机会。
开…的门
Three armed men were waiting when the postmaster and his wife arrived to open up the shop.
当邮政局长和妻子到邮局开门营业时，3名持械男子正等着他们。
Open up, or I break in!
把门打开，不然我要砸门了！
2、turn against
(使)与…反目;(使)反对;(使)反感
A kid I used to be friends with turned against me after being told that I'd been insulting him.
曾和我很要好的一个小孩听人说我一直在辱骂他以后就和我翻脸了。
Workers may turn against reform
工人们可能反对改革。