他的眼光毫无松懈地追踪著这个物体，直到它逐渐消失。
With unwearied diligence, his eyes pursued the object till it gradually disappeared.
我们将和老朋友和前敌手一起毫不松懈地削弱核威胁，应对全球变暖。
With old friends and former foes, we will work tirelessly to lessen the nuclear threat and roll back the specter of a warming planet.
我们将和老朋友和前敌手一起毫不松懈地削弱核威胁，应对全球变暖。
With old friends and former foes, we will work tirelessly to lessen the nuclear threat, and roll back the specter of a warming planet.
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