A searchlight is a very strong electric light that you can turn to point anywhere. The beam is a bright bar in the dark.

A searchlightsearchlight（探照燈） is a very strong electric light是一種非常強的電燈 that you can turn to point anywhere可以轉動，照向任何地方 The beam那道光束 is a bright bar in the dark在黑暗中是一條明亮的光柱

People use it to find someone, to watch a prison wall or a harbour, or in war to catch a plane in the sky. You also see them at big night shows, sweeping across clouds.

People use it to find someone人們用它來找人 to watch a prison wall or a harbour監視監獄的圍牆或港口 or in war to catch a plane in the sky或是在戰爭中用來捕捉天空中的飛機 You also see them at big night shows你也會在大型夜間表演裡看到它們 sweeping across clouds在雲層間來回掃射

A torch in your hand is a light too, though actually a searchlight is in another league: it is large, often on a truck, a roof, or a ship, and it is meant to reach far. The word is simply search + light — a light you search with.

A torch in your hand is a light too你手上的手電筒也是一種光 though actually a searchlight is in another league不過其實searchlight完全是不同等級 it is large, often on a truck, a roof, or a ship它體積很大，常常裝在卡車、屋頂，或船上 and it is meant to reach far就是要照得很遠 The word is simply search + light這個字就是search（搜尋）加light（燈） a light you search with就是用來搜尋的燈

It is mostly a noun; you can use it as a verb (to searchlight a hillside), but that sounds a bit technical or old. In everyday talk, people just say they turned the searchlight on.

It is mostly a noun這個字大多是當名詞用 you can use it as a verb (to searchlight a hillside)也可以當動詞用（to searchlight a hillside，用探照燈照山坡） but that sounds a bit technical or old但這樣聽起來有點生硬或老派 In everyday talk平常講話 people just say they turned the searchlight on大家就直接說「把探照燈打開」