(一)

跳蚤是个什么东西？我来告诉你在去年7月以前我对这种小东西的概念：
1． From Wikipedia, a free encyclopedia written in simple English for easy reading.

“a flea is 0.06 in. or 0.1524 cm. ”
“A flea is an insect that lives on many different types of animals and sometimes humans. Fleas are considered parasites, and they feed off of the blood of the animal they bite.
Fleas can live outdoors in sand or tall grass, and they will jump to any passing animal and lay eggs. Flea bites are usually red bumps and they are very itchy. They can carry disease and make animals sick. ”
2． 你看过

...阅读全文