1400年之后不久，造船工人开始开发一种新型的船，这种船设计合理，可以在开阔的水面上航行：它就是卡拉维尔号。
Shortly after 1400, shipbuilders began developing a new type of vessel properly designed to operate in rough, open water: the caravel.
他设计了一种袖口，可以让医务人员在采血的同时，避免让人看到和想到。
He designed a cuff that allows the medical professionals to get the blood while keeping that business out of sight and out of mind.
澳大利亚的研究人员一直在设计并测试一种能骗过狮子的方法，即在牛屁股上画眼睛，让狮子以为自己正被猎物注视着。
Researchers in Australia have been devising and testing a method of trickery to make lions think they are being watched by the painted eyes on cow butts.
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