Scientists have known for decades that mosquitoes/məsˈki:təʊz/ are attracted to the lactic acid contained in human sweat, but in the era before advanced genetics, the precise mechanism had remained a mystery.
几十年来，科学家们都知道蚊子会被人体汗液中所含的乳酸所吸引，但在高级遗传学出现之前，其确切原理一直是个谜。
Key words:for decades 几十年来；
mosquitoes/məsˈki:təʊz/ n. 蚊子；
lactic acid 乳酸；lactic→ relating to or derived from milk
contain (in) v. 包含于；
sweat n. 汗；
era n. 时代；=age （in the age of information 在这个信息时代里）
precise adj. 精确的；
mechanism n. 机制；
remain v. 保持；
