Like seaweed, sea grasses are very susceptible to human pollution.
和海藻一样，海草很容易受到人类污染的影响。
You could see the occasional solitary figure making a study of wildflowers or grasses.
你偶尔可以看见那个研究野生花草的孤独身影。
We should plant more trees and grasses.
我们应该种更多的树和草。
A sweet fragrance rose from the wild grasses.
野草散发出芳香。
Spring is green, including green trees and green grasses.
春天是绿色的，绿色的树木，绿色的草地。
We don't see as many types of vegetation, trees, grasses and so forth.
我们看不到那么多种类的植被、树木和草等等。
The most common materials used for nests are grasses, branches and feathers.
筑巢最常用的材料是草、树枝和羽毛。
It is because salt marsh grasses have found ways to adapt to the conditions there.
这是因为盐沼草已经找到了适应那里环境的方式。
Though small, the country has abundant plants from desert grasses to tropical jungle.
这个国家虽然小，但植物种类丰富，从沙漠草原到热带丛林都有。
The seeds of grasses, flowers, and blooming trees made the long trips to these islands.
草、花和开花的树的种子长途跋涉到达这些岛屿。
Grasses are simple forms of angiosperms that bear their encapsulated seeds on long stalks.
草是被子植物的简单形态，种子被包裹在长茎上。
Then there is fossilized pollen, from low shrubs and grasses that once grew in the Sahara.
还有一些石化的花粉，来自于曾经生长在撒哈拉的小灌木丛和草丛。
For this the priests used long grasses, and these—when the kite was in the air—would stream along behind it.
为此，牧师使用了长长的茅草，当风筝在空中飞时，这些草就会在风筝后面飘动。
I got all the flowers and all the grasses ready and printed the names on pieces of cardboard, to stick in with them.
我把所有的花和草都准备好了，把名字印在纸板上，和它们粘在一起。
The inhabitants turned to wild cereal grasses instead, collecting them by the thousands, while the percentage of nuts in the diet fell.
居民们转而采集大量野生谷物类牧草，而坚果在饮食中所占的比例下降了。
Within a vertical distance of just a few tens of meters, trees disappear as a life-form and are replaced by low shrubs, herbs, and grasses.
就在几十米的垂直距离内，树木这种生命形式消失了，取而代之的是低矮的灌木、草本植物和小草。
The raising of livestock is a major economic activity in semiarid lands, where grasses are generally the dominant type of natural vegetation.
在半干旱地区，草地通常是最主要的天然植被，而该地区主要的经济活动是家畜饲养。
These practices include grazing animals on grasses grown from the pastureland's natural seed bunk, and fertilized by the cows' own fertilizer.
这些做法包括放牧动物吃从牧场的天然种子铺上生长的草，并用奶牛自己的肥料施肥。
In contrast, the roots of grasses and other small plants may help to hold loose soil fragments together, thereby helping to prevent erosion by the wind.
相反，草和其他小植物的根可能有助于把松散的土壤碎片固定在一起，从而助于防止风的侵蚀。
Though plenty of rain may fall on savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses.
尽管一年中大草原上可能会有大量降雨，但至少有一段时间是降雨很少的，造成干旱压力，最终有利于牧草生长。
A ubiquitous woodland mix of lawn grasses and trees has found its way throughout Europe and the United States, and it's now spread to other cities around the world.
一种无处不在的草地和树木混合的林地已经遍布欧洲和美国，现在已经蔓延到世界各地的其他城市。
For the next 1,500 years, its inhabitants enjoyed a somewhat warmer and damper climate than today, living in a well-wooded steppe area where wild cereal grasses were abundant.
在接下来的1500年里，这里的居民享受着比现在稍微温暖和潮湿的气候，他们生活在树木繁茂的草原上，那里有大量的野生谷物草。
Then, about 7000 B.C., within the space of a few generations, they switched abruptly to herding domesticated goats and sheep and to growing einkorn, pulses, and other cereal grasses.
后来，大约在公元前7000年，在几代人的时间里，他们突然转向放牧家养的山羊和绵羊，转而种植单粒小麦、豆类和其他谷类牧草。
There were too many grasses and other plants for us to move forward.
这里的草和其他植物太多了，我们不能往前走。
This happened over and over, but we soon learned to identify different grasses like cockleburs, lamb's-quarters, foxtails, and the king of weeds, the pretty purple thistle.
这样的事情发生了一次又一次，但我们很快就学会了识别不同的草，如苍耳、藜、狐尾草，以及杂草之王——漂亮的紫色蓟草。
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