low key不是暗恋的意思。

low-key

adj. 低调的，软调的； 低强度的； 抑制的； 有节制的

例句：

In a quiet corner, a low-key child.

在一个安静的角落，做一个低调的孩子。

The wedding will be a very low-key affair.

婚礼将低调举行。

He wanted to keep the meetings low-key.

他不希望将会议扩大。

Their wedding was a very low-key affair.

他们的婚礼办得很低调。

This is his high-profile markets do, so low-key charity.

“这是他高调做市场，低调做慈善”。