1、open up

（使）（地方、經濟、興趣領域等）開放

As the market opens up, I think people are going to be able to spend more money on consumer goods.

隨著市場的放開，我認為人們將能夠增加用于消費品的支出。

He said he wanted to see how Albania was opening up to the world.

他說他想看看阿爾巴尼亞是如何對外開放的。

（使）（機會、可能性等）出現；（使）產生

It was also felt that the collapse of the system opened up new possibilities.

人們也認為這一制度的崩潰帶來了各種新的可能性。

New opportunities are opening up for investors who want a more direct stake in overseas companies.

希望更加直接地參股海外公司的投資者獲得了新的機會。

開…的門

Three armed men were waiting when the postmaster and his wife arrived to open up the shop.

當郵政局長和妻子到郵局開門營業時，3名持械男子正等著他們。

Open up, or I break in!

把門打開，不然我要砸門了！

2、certain

肯定的;有把握的;毫無疑問的

She's absolutely certain she's going to make it in the world.

她堅信自己會出人頭地。

We are not certain whether the appendix had already burst or not.

我們不敢肯定闌尾是否已經破裂。

必然的;必定的;肯定的

However, the scheme is certain to meet opposition from fishermen's leaders.

然而，這項計劃一定會遭到漁民領袖的反對。

It's not certain they'll accept the Front's candidate if he wins.

即便來自陣線的候選人獲勝，他們能否接受他還說不準。

確鑿的；無疑的

One thing is certain, both have the utmost respect for each other.

有一點可以肯定，那就是雙方都非常尊重對方。

It is certain that Rodney arrived the previous day.

羅德尼肯定是頭天到的。