园艺技术:自己种植洋葱

短语讲解：

1. They stand straight up and thicken at the bottom to form a bulb.

stand up 竖立
例句：Stand it up over here.
把它竖在这里。

2. Onions are biennials; their life cycle is two years long.

life cycle生命周期
例句：This plant effloresces only once during its life cycle. 
这植物在其生命周期中只开花一次。 

3. In warmer climates, onions can begin developing bulbs with fewer hours of daily sun.

begin with以…开始, 从…开始
例句：We will now hear the students read their poems, beginning with Tom.
现在我们来听听学生们朗诵他们的诗作, 从汤姆开始吧。

4. The bulbs can be pulled from the ground once their tops have dried and fallen over.

fall over从…上跌落, 掉下来
例句：The cascade falls over a tall cliff.
瀑布从高高的悬崖上倾泻下来。

5. Curing is a way of making sure those leaves on the outside are nice and dry.

make sure确保
例句：We and our friends will make sure of that.
我们和我们的朋友要确保这一点。

6. Then bring them out of direct sun for two to three weeks.

bring out把…从室内搬出来, 带出来
例句：It's warm enough to bring out the garden chairs.
天气很暖和, 可以把花园用的椅子搬出来了。

7. Spread them out in any warm, airy place that is covered.

spread out伸展; 延长
例句：The wood spread out in all directions.
树木向四面八方延伸。

8. The sheet will keep the sun from burning the bulbs.

keep from阻止; 免于
例句：They should try to keep prices from rising.
他们应该设法阻止价钱上涨。

9. Turn the bulbs a couple of times to help them dry evenly.

a couple of两个, 几个
例句：There are a couple of possibilities.
有很多种可能性。

10. Some people cut off the top leaves before curing onions.

cut off剪〔切, 砍〕下
例句：Kehr cut off some flowers from the bush.
凯尔从树丛中剪下一些花。