Any of various dark-colored, chiefly nonvenomous snakes, such as the black racer or the black rat snake of North America.
黑蛇一种黑色，多为无毒蛇类，如北美黑游蛇属黑蛇和食鼠黑蛇。
Larry's appointment comes after a rat was spotted in two television news bulletins scurrying around outside the black door of the prime minister's residence in central London.
拉里走马上任前，人们曾在两段电视新闻中看到伦敦中部首相府邸的黑门外，有只老鼠蹿来蹿去。
So he goes up to rat-ridden garrets, to black holes, as high as he can mount, and there he sets to singing, declaiming, how do I know what?
因为他一到家里，便到那些住耗子的阁楼上，那些黑洞里，越高越好，他在那里又唱又朗诵，谁知道他搞些什么！
Time out of the rat race on the black sands of Perissa beach on the east coast of Santorini island.
在圣托里尼岛东岸的佩里萨黑沙海滩享受远离都市竞争的休假。
Thee cat from the Dong family saw the rat in the jar stick up its pointed ears, stare with a pair of pitch-black eyes, shake its red whiskers and squeak.
东家的猫看到瓮中的老鼠，竖着两只尖尖的耳朵，瞪着一双漆黑的眼睛，抖动着红红的胡须，吱吱吱乱叫。
The nature, shape, structure and distribution of osmiophilic cells in the rat thymus were studied by the osmium black method silver impregnation and histochemistry.
应用锇黑法、银浸法和酶组织化学法探讨了大鼠胸腺嗜锇性细胞的分布、形态结构和性质。
Larrys appointment comes after a rat was spotted in two television news bulletins scurrying around outside the black door of the prime ministers residence in central London.
拉里走马上任前，人们曾在两段电视新闻中看到伦敦中部首相府邸的黑门外，有只老鼠蹿来蹿去。
The results showed that black pigment of frog tadpole can effectively cleaned up the free radical in rat liver tissue, and inhibited lipid peroxidation.
研究发现，蝌蚪黑色素能有效清除激发态自由基。对肝脂质过氧化有明显抑制作用。
The results showed that black pigment of frog tadpole can effectively cleaned up the free radical in rat liver tissue, and inhibited lipid peroxidation.
研究发现，蝌蚪黑色素能有效清除激发态自由基。对肝脂质过氧化有明显抑制作用。
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