make sure +從句 = make sure of 弄清、查清楚。
例句：
Make sure you get a good look at their faces.
你一定要仔細看清他們的面孔。
Make sure that sign's the right way up.
一定不要把這招牌掛顛倒了。
Make sure you park your car clear of the entrance.
切莫把車停在入口處。
We make sure our clients get the best that money can buy.
我們確保客戶買到最好的產品。