scratch vt.抓；挠
He scratched the insect bite on his leg (with his nails).
他（用指甲）在他腿上搔虫咬的地方。

sneaky adj. 鬼祟的, 卑鄙的

bug spray 喷雾杀虫剂

put up with 容忍，忍受

【拓展词汇】
mosquito net 蚊帐

rash  n. 疹

malaria n.疟疾

bug  zapper灭虫器

pesticide n.杀虫剂