豚

Pollen of the ragweed plant is a common allergen.

豚草属植物的花粉是常见的过敏原。

Coarse perennial ragweed with creeping roots of dry barren lands of southwestern United States and Mexico.

生长于美国西南部和墨西哥干燥贫瘠土地的粗糙的多年生豚草，有匍匐根。

Early exposure to dogs and cats not only suppressed the response to dogs and cats, it lowered the likelihood that they were going to be allergic to ragweed or grass or mold.

孩子们幼年对猫、狗的接触不仅会抑止他们对猫、狗的过敏反应，也会降低他们对豚草、青草或霉菌过敏的可能性。

Warning: Do not take this product if you have gallstones or a bile duct obstruction, or are allergic to ragweed, chrysanthemums, marigolds, or daisies.

警告：不要把这个产品如果您有结石或胆管梗阻，或有过敏反应的豚草，菊花，金盏花，或雏菊。

Even more remarkable, children who had two or more dogs or cats had an even greater reduction, up to 77 percent, in risk of allergies. And not only were they less likely to develop allergies to cats and dogs, but also to dust mites, short ragweed and blue grass.

更值得注意的是，那些拥有两只或更多小宠物的儿童，患过敏症的病例甚至要少很多，比同龄儿童降低了77％，他们不但不易对小猫和小狗过敏，而且对尘粒、豚草和早熟禾等过敏原的过敏率也下降了。

Ragweed allergens may also cause allergy symptoms in the fall.

豚草过敏可能会引起过敏症状秋季(8月下旬至霜冻前)。

Using the latest meteorological data, the 60-second report provides pollen level estimates for the coming 24 hours - in addition to current tree, grass and ragweed pollen levels.

利用最新的气象资料， 60秒报告提供花粉水平估计未来24小时-除了目前的树，草，豚草的花粉水平。

Some organisms which cause uncomfortable allergies with people include Ragweed, Poison Ivy, and Honey Bees.

过敏与机体造成某些人不舒服，包括豚草、毒藤、蜜蜂。

It is suggested that the integrated ragweed management which combines plant displacement with physical control based on biological control will be a major approach for control of ragweeds in the future.

提出以生物防治为主体，结合植物替代控制和物理防治，尽可能地不实施化学防治的的综合治理体系是未来豚草防治的一个主要途径。

The first year's weeds on the Michigan plot are annual flowering plants, followed by tougher perennials like crabgrass and ragweed.

第一年到访的杂草是每年开花的草本植物，接着被更坚韧的多年生植物如沙果草和豚草取代。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。