基本解释蟑螂同根派生 英汉例句I was afraid those big, black cockroaches were going to bite me.我怕那些又大又黑的蟑螂要咬我。One black beetle bled only black blood, the other black beetle bled blue.一种蟑螂只流黑色的血，而另外的蟑螂流蓝色的血。