For example, did you know that 1 in 4 teenagers has tried marijuana?
比如,你是否知道4个青少年中就有1位曾经吸过大麻?
There had been fuel on the ship, but this did not appear to have caused the fire, and little smoke was produced.
很显然,船舱里已经发生了一场烈火,但是船舱内壁却完好无损。船上存放着汽油,但火灾似乎不是它引起的,因为没有冒出什么烟来。