It means their fishing expedition came up empty.這意味著他們的試探性盤查毫無所獲

come up靠近，走進

His new book did not come up to expectation.

他的新作沒有達到預期水平。

It gets hot after the sun has come up.

太陽升起后，天氣就熱了。

Chances are, McGowen is just gonna head for deeper waters.也有可能麥高恩探員將更深入調查

head for朝 ... 方向去

The boat was heading for some rocks.

那船正駛向礁石。

The ship came about and headed for the shore.

輪船調轉般向朝海岸駛去。

Just make sure Emily's on board with that.不過你要保證艾米莉站在咱們這邊

make sure設法確保

I'm going to make sure if I'm going to Macao.

我要拿定主意我是否去澳門。

I'll make sure of the time of the flight.

我要核實一下這班飛機的時間。