Across the American continents, exotic species are those introduced after the first European contact.

在美洲大陆上，外来物种是在第一次接触欧洲后引进的。

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In some case, non-native species of oysters are introduced after a population decline, and they bring with them diseases that further kill off the native oysters.

在一些例子中，非本土种类的牡蛎会在本土数量下降后引入，它们随身带来的疾病会进一步杀死光本土牡蛎。

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The law was introduced after a third-grade girl was expelled for a year because her grandmother had sent a birthday cake to school, along with a knife to cut it.

该法规在一个三年级女生被开除后一年得以实施。 这个女孩的外婆送了个生日蛋糕到学校，同时还有一把刀用来切蛋糕。

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After a bill is introduced in Congress, it is then sent to a committee for review.

VOA: special.2009.08.14

Well, this shows what happened in the period after this vaccine was introduced into the general population so that would have been in 1954.

这表明了,疫苗在一九五四年,引入大众后的一段时间内,发生了什么样的情况

耶鲁公开课 - 生物医学工程探索课程节选

The question is "What happens after a vaccine is introduced into the body?"

问题在于,人体在接种疫苗后会发生什么样的变化

耶鲁公开课 - 生物医学工程探索课程节选

The bill is being introduced after months of negotiations with abortion-rights advocates, religious leaders and legislators.

WSJ: Cuomo Abortion Push Sets Up Fight In N.Y. Senate

The euro was planned against her wishes and introduced after she had left the scene.

WSJ: What Would Margaret Thatcher Do?

The double eviction was introduced after TV bosses decided to spice up the show.

BBC: Jon evicted from Big Brother