我家后院有一大片夜来香。这还是奶奶在年轻的时候种下的。夜来香的花有的是淡紫色的,有的是粉红色的。它一般在晚上开花。月上树梢时,晚风拂过,一阵阵醉人的清香从后院散开,传遍我家的每一个角落。妈妈说,夜来香是驱虫神器,蚊子不喜欢闻这种气味。夏天的晚上,院子里夜来香绽放,蚊子不敢来,我们就可以在这里玩个畅快。夜来香的花散发出来的香味在晚上是最浓郁的,这是为什么呢? My home backyard has a large night of incense. This is what my grandmother planted when she was young. Some flowers of lavender are lilac, some are pink. It usually blooms at night. On the treetops of the month, the breeze blowing, a burst of intoxicating fragrance diffuse from the backyard, spread throughout every corner of my house. Mom said that evening primrose is a deworming artifact, mosquitoes do not like to smell this smell. Summer evening, the yard blooming incense, mosquitoes can not come, we can play a fun here. The fragrance of evening primrose flowers is the most intense at night, which is why?