1·方法对安徽省1996~2004年度发生的6 744例急性农药中毒病例进行流行病学调查，并对当地使用较多的农药作急性毒性鉴定分析。
Methods A epidemiologic survey were undertaken for 6744 cases from acute poisoning of pesticides in 1996~2004.
2·你也许没有听说过NGC6744，一个距离地球3千万光年的的星系，但是它看上去一定让你感到熟悉。
You may not have heard of NGC 6744, a galaxy about 30 million light years away from Earth, but it sure looks familiar.
3·从地球上看，NGC 6744的大小差不多等于三分之二个满月。 可惜的是，由于太过昏暗，我们惟有通过后院式望远镜才能观测到它。
Viewed from Earth, NGC 6744 is about two-thirds the size of a full moon, but it's so faint you can't see it without a backyard telescope.