1.【植】豚草属植物
1.a North American plant that produces a lot of pollen
1.It meant crossing a broad field of ragweed, breathing heavily as the two of us lugged the canoe, heavy with its layers of paint.
这意味着要越过宽阔的豚草区；我们两个小伙子气喘吁吁地拖着有很沉涂料层的独木舟。
2.Hakka mountain pig is the main lines of business, and the pigs using less feed, even to a child once played ragweed.
客家山区，是猪的主要业务，并使用更少的猪饲料，甚至曾经扮演过豚草一个孩子。
3.The two grubby small boys with two-coloured hair who were digging among the ragweed in front yard.
两个肮里肮脏的长着亚麻色头发的小男孩正在前院的杂草丛里挖什么东西。
4.The Common Agricultural Policy, which instituted the fallow system, initially contributed thereby to the increase of Ragweed.
共同农业政策，其中提起的休耕制度，初步作出了贡献，从而对豚草的增加。
5.Even if you live in an urban area, you can still be affected because ragweed grains can travel up to 400 miles.
猪草花粉可以飘到400英里的区域，所以即使你住在郊区，仍然难免受到期困扰。
6.It's enough to make you grab a tissue: Minneapolis has tacked 16 days to the ragweed pollen season since 1995; LaCrosse, Wisc.
下面的数据将使你忍不住抓起一张纸巾：明尼阿波利斯市自1995年以来的花粉季增加了16天；
7.Once exposed to ragweed, allergy sufferers often experience sneezing, runny noses and swollen, itchy, and watery eyes.
一旦过敏患者接触到猪草花粉，就会出现打喷嚏，流鼻涕，浮肿，发痒和流眼泪的症状。
8.Early clinical tests of CpG added to ragweed antigen have shown promise as a vaccine against hay fever.
将CpG加入猪草抗原的早期临床测试带来对抗花粉热的希望；
9.S. Ragweed blooms from mid-August to October and is most prevalent in the Northeast, South and Midwest U. S.
在美国，猪草活跃的时间很长，花期从8月中旬到十月份，主要区域在东北部，南部以及中西部地区。
10.The first year's weeds on the Michigan plot are annual flowering plants, followed by tougher perennials like crabgrass and ragweed.
密歇根土地上第一年的种子是每年都开花的植物，接着被更坚韧的像沙果草和豚草取代，灌木成荫压倒了花丛。