Invisible, odorless, generally harmless to humans-and the very thing that's warming the planet.
二氧化碳无色无嗅，通常也不会对人类造成危害，但却是地球变暖的确凿元凶。
Now the generally accepted method to handle and collect invisible fingerprints of sweat is by means of lime or ink powder.
提取汗潜指纹通常采用的方法是用灰粉或墨粉进行处理，但在渗透性材料上，如纸张、硬纸板等最合适的方法是采用碘熏法。
His first novel Go Tell It on the Mountain, together with Richard Wright's Native Son and Ralph Ellison's Invisible Man, is generally considered to be the model of black literature in 1940s and 1950s.
他的首部小说《向苍天呼吁》与理查德。赖特的《土生子》和拉尔夫·艾利森的《看不见的人》被并列为二十世纪四五十年代美国黑人文学的典范。
His first novel Go Tell It on the Mountain, together with Richard Wright's Native Son and Ralph Ellison's Invisible Man, is generally considered to be the model of black literature in 1940s and 1950s.
他的首部小说《向苍天呼吁》与理查德。赖特的《土生子》和拉尔夫·艾利森的《看不见的人》被并列为二十世纪四五十年代美国黑人文学的典范。
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