Here's a neat genetic trick: Make a chicken that can get the flu, but can't pass it on to other birds - or, presumably, to the humans who take care of them.

这是一个简单的基因戏法：创造出一种能感染流感的鸡，但是它又不会把流感传染给其他禽类，或者，像设想的那样不会传染给养殖它们的人类。

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Scientists are also trying to use a cocktail of chemicals to trick other kinds of stem cells that don't normally make heart cells to take on that role.

科学家也在尝试使用混合药剂将一般不能分化成心脏细胞的其它种类的干细胞诱导成心脏干细胞。

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Life is going to shovel dirt on you, all kinds of dirt, the trick to get out of the well is to stop wailing, and not let the dirt bury you, but to shake it off and take a step up.

生活时刻都在把各种各样的泥土往你身上铲，不被泥土淹没而从井里逃脱出来最好的方法就是停止哭泣，站起来抖抖身上的泥土勇敢地往前走。

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The third was Jermaine Lawson for West Indies v Australia at Bridgetown in 2002-03 (last two wickets in the first innings and first in the second) - and he was the first West Indies player to take a hat- trick on home soil.

BBC: Ask Malcolm Ashton

Take a minute to comment on this post and tell us why trick or treating is special in your community.

FORBES: 2011 Trick-or-Treating Hot Spots