Open Ch. 1 and then close Ch. 2. Verify that Ch. 2 is within specification.
开路通道1，然后闭合通道2。验证通道2在规定的技术指标范围之内。
Not only did the acquisition of these lands enable Ch 'in to secure its flank, but their loss by Ch 'u seriously weakened the power of that state, heretofore perhaps Ch 'in's major rival.
得到这些领土，不但使秦能确保其侧翼的安全，而且由于楚国丧失巴蜀，这个国家的国力，大大削弱，迄今为止，它也许是秦的主要敌人。
Not only did the acquisition of these lands enable Ch 'in to secure its flank, but their loss by Ch 'u seriously weakened the power of that state, heretofore perhaps Ch 'in's major rival.
得到这些领土，不但使秦能确保其侧翼的安全，而且由于楚国丧失巴蜀，这个国家的国力，大大削弱，迄今为止，它也许是秦的主要敌人。
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