drop down

The fruit has begun to drop down.

水果开始落地。

The overripe apples dropped down from the trees.

过熟的苹果从树上掉了来。

After the crash,onlookers said that the plane had suddenly dropped down out of the sky.

飞机坠毁后旁观者说飞机是突然从上掉来的。

RISI, a global forest products information source, reports an average paper demand drop of 4% in 2007 with coated freesheet grades down 9%, mechanical grades down 2%, uncoated freesheet down 4%.

瑞西，全球森林产品的信息来源，报告的平均需求量降了4 ％ ，在2007年与涂层免费降了9 ％ ，机械降2 ％ ，未免费跌4 ％ 。