Get your head around it:

用頭繞著某物 ×

明白，搞清楚 √

例句：

I didn't get my head around the fact yet.

我至今沒搞清楚事情的真相。

Step up your game:

走向你的游戲 ×

有更好的表現(xiàn) √

例句：

If you want to win this competition, you'll have to step up your game.

如果你想贏得這場(chǎng)比賽，你必須得有更好的表現(xiàn)。

To see red:

去看紅色 ×

生氣 √

例句：

It always causes me to see red whenever he tells a lie.  

當(dāng)他說謊時(shí)，不管什么時(shí)候總是引起我的憤怒。