蔬菜栽培

It has a long history,abundant in nutritions and plays an very important role in vegetable production of ournation.

其栽培历史悠久，营养丰富，在我国蔬菜生产中占有十分重要的地位。

As one of the traditional vegetables and advantage garden crops in China, cultivated area and output of garlic rank the first place in the world. Being a universally accepted fine front stubble crop, garlic root exudates is one of the factors which affect the next stubble crops.

大蒜是我国传统蔬菜和优势园艺作物，栽培面积和产量均居世界第一，是公认的良好前茬作物，大蒜根系分泌物可能是大蒜影响下茬作物的重要因子之一。

This sort of big plasticshed was very suitahle to cultivating the vegetables using frame, such as cucumber,tomatoand stick bean etc.

秫秸架式结构塑料大棚最适于栽培黄瓜、番茄、架豆等搭架蔬菜，因其使用寿命仅为1a，便于轮作倒茬，利于防治病虫害，而且用材简单，建造容易，温度、光照性能优越，是一种投资少、见效快、易推广的大棚形式。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。