The main reason children drop out is not poor teaching but the need to work and, for girls, to marry, according to the Mexican Institute for Competitiveness (IMCO), a think-tank.

根据一家智囊机构墨西哥竞争力研究所的调查，孩子辍学最主要的原因不是上不起学，而是需要干活，对女孩来说还要嫁人。

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The Saturn fuel tank will detach from the body of the main LCROSS unit - which, stuffed with cameras and sensing equipment, ACTS as the mission's brain.

土星燃料箱将从LCROSS的主体上分离，而主体就像本次航天任务的大脑，同时也携带摄像机及感应设备。

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There are two main reasons, argues Martin Weale, director of the National Institute of Economic and Social Research (NIESR), a think-tank.

国家经济社会研究所是一个智囊团。其所长Martin Weale表示，造成上述情况有两个原因。

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Virtually every front-line U.S. weapon from the M-1 main battle tank to the F-14, -16, -18 and -22 fighter aircraft to the AEGIS cruiser and Trident submarine is critically dependent upon foreign-manufactured ceramic packages for its guidance, sensors, command and control or other essential subsystems.

CENTERFORSECURITYPOLICY: Center for Security Policy | Tilt! US Security, Industry Dangerously Dependent on Foreign Sources for Critical Electronic Components