四月京城杨絮飘好似晴天雪！网友：春天有一种痛，叫会呼吸的痛

　　又到了每年的飞絮季节，出趟门，像是在大雪天里行走。尤其是对过敏性鼻炎患者来说，在漫天飞絮中一边擦鼻涕，一边打喷嚏，画面简直不要太美。

　　为了应对这一状况，北京市已经绘制了在春天造成大范围飞絮的杨柳树雌株分布地图，力争到2020年使杨柳飞絮明显改善。

　　北京已经绘制了杨柳树雌株的分布地图，试图控制在每年春天都出现的柳树和杨树飞絮。

　　catkin['kætkɪn]：n. [植]柔荑花序(如柳絮等)

　　The Chinese capital has been blanketed by catkins each spring for decades.

　　几十年来，北京每年春天都深受杨柳飞絮的困扰。

　　很多网友纷纷在网上吐槽，春天有一种痛，叫会呼吸的痛……

　　The trees were planted in the 1960s and 1970s as a cheap, easy-to-maintain and quick-growing way to make Beijing greener.

　　这些树木是在上世纪六七十年代种植的，因为这种绿化树木对北京来说价格便宜、易于维护而又生长快速。

　　Female trees look very similar to the males. The capital’s parks authority began a survey in 2017 to find out where female willows and poplars were planted so it could neutralize the catkins and go some way to sparing citizens weeks of sneezing and watery eyes as pollen spread, Beijing Youth Daily reported on Monday.

　　雌株从外观看起来与雄株非常相似。据《北京青年报》本周一报道，北京市公园管理部门2017年开始进行调查，以确定杨柳树雌株都分布在哪里，这样就可以控制飞絮，从而在一定程度上让市民免受数周花粉传播导致的打喷嚏和流眼泪等症状困扰。

　　neutralize['nju:trəlaiz]：vt.中和;使无效

　　Aerial photography was used, with urban areas inside the Fifth Ring Road – where most of the city’s population lives – divided into 2,866 grids, each of 250,000 square meters, Qin Yongsheng, an official with the Beijing Gardening and Greening Bureau, said.

　　北京市林业工作总站副站长秦永胜说，调查人员采用航拍技术，把五环内城区划分成2866张航片网格图。每个网格的范围是25万平方米。北京市绝大多数市民都生活在五环内。

　　Three hundred students from Beijing Forestry University trained to identify the female varieties plotted the trees’ locations by species and growth, and marked them for follow-up action if required.

　　北京林业大学的300名经过培训的学生担任了此次的调查人员，他们按照种类和生长速度确定杨柳树雌株的分布，并标记位置，为后续行动做准备。

　　The survey found there were 284,000 female willows and poplars inside the Fifth Ring Road, with nearly 38 percent in the Chaoyang district. In some areas, there were about 10,000 such trees within one grid, with the highest densities found in the southwest of the city, between the Fourth and Fifth ring roads.

　　调查发现，北京五环内共有杨柳树雌株28.4万株，其中近38%在朝阳区。在一些地区，一个网格内大约有1万株雌株，密度最高的是在北京西南四环和五环之间。