单词frass
n.: 虫粪;蛀屑;昆虫排泄物网络: 虫粪便;残渣;费拉斯
昆虫排泄物
蛀屑
虫粪
The number of emergence holes and frass holes in weeping willows on both banks of Qinhuai river are investigated.
调查了外秦淮河两岸垂柳上光肩星天牛羽化孔、排粪孔的分布情况。