Unless we start making some sales, we're done for.

　　如果我們還賣不出去，那我們就完了。

　　I sleep with the window open unless it's really cold.

　　天氣若不很冷，我總開(kāi)著窗戶睡覺(jué)。

　　Unless something unexpected happens, I'll see you tomorrow.

　　如果不出意外，我明天去看你。

　　They refused to release their hostages unless certain conditions were met.

　　除非某些條件得到滿足，否則他們不會(huì)釋放人質(zhì)。

　　The theatre faces closure unless it gets an urgent cash injection.

　　劇院面臨著倒閉，除非有大筆救急現(xiàn)金投入。