The painting started to drop down in its frame and was shredded by some blades hidden in the bottom of the frame.

那幅画从框中脱落掉下来，被藏在画框底部的刀片切成了碎片。

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Experiments have also cast serious doubt on the belief that yawning is triggered by a drop in blood oxygen or a rise in blood carbon dioxide.

对于打哈欠是由血液中的氧气减少或血液中的二氧化碳增加引起的这种观点，一些实验也同样提出了严重的质疑。

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He said by the end of the year, there was a 6 percent drop in the consumption of such drinks.

他说，到今年年底，这类饮料的消费量下降了6% 。

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Just last week,the Commerce Department reported an unexpected drop in December in the number of housing starts by builders.

VOA: special.2011.01.24

He points to a big drop in the number of planned job cuts announced by employers over the past six months.

VOA: special.2010.07.02

Another doctor believes that Ernest Shackletons vision was caused by a drop in blood sugar.

VOA: special.2010.02.24

To that end the chain is constantly adding reasons for customers to linger longer at the stores or to drop by in the evening or afternoon (traffic peaks between 8 a.m. and 10 a.m.).

FORBES: Magazine Article

We see a steep drop off in revenues and units near term, punctuated by a drop in subscriber adds, and an OS refresh that is largely ignored by carriers and consumers alike, driving RIM into a forced sale in 2013.

FORBES: Why RIM Won't Be Bought: There's Not Much There There

To be sure, Thursday's drop was in part driven by the major drop-off seen in the rest of the market, but shares had been trading down significantly throughout the day.

FORBES: Earnings Season