慢速英语:A Visit to Volcanoes National Park and Haleakala National Park

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no longer不再, 已不, 不复, 再也不

例句：He was long a famous musician, but he plays no longer.
      他成为有名的音乐家已很久了, 但他现在不演奏了。

      The city's water supply is no longer adequate for its need.
      这个城市的供水已不敷需求。

2.Then there is nothing but black lava rock. At one place, we begin to enter the clouds that hang close to the mountain.

nothing but只有, 只不过

例句：I had nothing in the world but a million-pound note.
      除了一张百万英镑的钞票, 这世上我是一无所有。

3.Our driver turns on the headlights of the vehicle.

turn on打开（水、电视、收音机、灯、煤气等）

例句：This tap is stiff; it won't turn on.
      这个龙头太紧, 拧不开。

      Please turn the light on for me; it's getting dark.
      天要黑了, 请把灯给我打开。