全部

1·Sir David Attenborough urged people to take part in a nationwide count of butterflies to help find out if the hot, dry spring has hit the insects.

大卫·爱登堡先生呼吁全国人民一起统计蝴蝶种类和数目，看看炎热干燥的春季是否对蝴蝶的生存造成了影响。

2·As some tiny insects and insect eggs, because of their tiny body and large quantity, it is difficult to count their Numbers with an expected accuracy by human being using naked eye.

对于一些微小昆虫和虫卵进行数量统计时很困难，因为这些昆虫和虫卵的个体很小，数量很大，人眼统计时准确率会明显降低。