寒冷的天气使树叶变红了。
酸是一种化合物,它在溶于水时具有强烈的气味和对金属的腐蚀性,并且能够使某些蓝色植物染料变红。
Acids are chemicalcompounds that, in water solution, have a sharp taste, a corrosiveaction on metals, and the ability to turn certain blue vegetable dyesred.
参加演习的那些人谈到能够“改变红点和蓝点”;使友军(蓝)看上去是敌军(红),反之亦然。
Those who play war games speak of being able to "change the red and blue dots" : make friendly (blue) forces appear to be the enemy (red), and vice versa.
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