Two high school students from Canada have invented a magic backpack.

两名来自加拿大的高中生发明了一种神奇的背包。

youdao

There are two high hurdles to overcome, however, before the numbers can fall.

然而，在这个庞大的数字下降之前，还有两大障碍需要克服。

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I have chosen these two methodologies because I believe that a SOA project has two high-level phases.

我之所以选择这两个方法，是因为我认为SOA项目具有两个高级阶段。

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If another photon strikes one of these high-energy electrons, the electron releases two photons that travel together at the same wavelength.

VOA: special.2010.09.01

her brothers were eleven and nine: unusually young actors, we might think, to be engaged in such high-flying philosophical debates as these two characters find themselves in.

分别是11岁和9岁，不寻常的小演员，我们可能会想，他们来演这雄心壮志的哲学辩论,是怎么样的。

耶鲁公开课 - 弥尔顿课程节选

And some lower-paying jobs require only two years of college, or even a technical education program in high school.

VOA: special.2009.10.15

Whatever the gadgets to blend the two -- high-speed modems, Microsoft's WebTV, something else -- the public isn't ready yet.

FORBES: The Convergence Gamble

But railway planners talk of a two-day high-speed trip from Shanghai to London by 2025.

ECONOMIST: Banyan

Those fifty-two-inch high-definition plasma televisions that people hang on the family room wall these days cost five times what a top-of-the-line set would have cost ten years ago, but buyers are willing to shell out the extra money because the enhanced viewing quality is worth the price.

NPR: Excerpt: 'The Healing Of America'