Colombia has emerged as the second front in the battle against Zika in the Americas.

在美洲地区，哥伦比亚新近成为对抗兹卡病毒的第二个战场。

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It was the sound of the gunfire of these paratroopers, the spearheads of the enormous landing forces that declared the opening of the second front.

作为大规模登陆战的前锋，正是这些伞兵们的枪声拉开了“第二战场”的帏幕。

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The second front was opened in Europe and the military priority which the High Command had for two years and a half given to the European theater paid off.

欧洲第二战场被开辟而最高指挥部在欧洲舞台两年半的军事优先权被付清。

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The first one will be above and below the bond axis is where we'll see the electron density, and the second will be perpendicular to that, so it will be a density in front of and behind the bond axis.

第一个是在键轴之上和之下,我们可以看到电子密度，另外一个垂直于它，所以在键轴之前和之后有电子密度。

麻省理工公开课 - 化学原理课程节选

Then, when we open up the front, we see the author's note to the second edition, and this was something O'Connor added to the novel in 1962.

然后当我们打开书的前几页，会看到作者对第二版的注解，这是奥康纳在1962年加上去的。

耶鲁公开课 - 1945年后的美国小说课程节选

He is a bit less sure in his handling of international politics, adopting the traditional view that, in the strategic arguments over the second front, the American generals were right and Winston Churchill deluded by imperial nostalgia.

ECONOMIST: Franklin Delano Roosevelt: The man who saved his country, and the world | The

Not the second front-facing camera.

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The appeals court ruling is likely to bring the debate over the Second Amendment front and center once again.

NPR: D.C. Court Overturns Strict Gun Ownership Rules