adj.擊退的；討人嫌的；相斥的
n.討厭的人；驅(qū)蟲劑；抗耐劑
=repellent.
Therefore, it is not surprising that the origins of mosquito repellant are from long ago. 因此，驅(qū)蟲劑的起源悠久實(shí)不令人意外。
