1.
Study on Stabilization of Soils with Enzyme X-22 and White Lime-Fly Ash;
用坚土酶和熟石灰粉煤灰加固土壤的研究
2.
firm concrete fencing
坚固的混凝土围墙材料.
3.
We resolutely carried the land reform through.
我们坚决地完成了土改。
4.
Researches on the Individual Development and Isozyme of Camaena Cicatricose;
皱疤坚螺Camaena cicatricose个体发育及同工酶研究
5.
Similarily, the soil hydrogen peroxidase, urease and phosphatase activities were increased obviously.
显著增强土壤过氧化氢酶、酶和磷酸酶活性。
6.
The activity of Soil urease, acidphosphotase and invertase weakened with increase of soil depth.
各林地土壤脲酶、酸酶和转化酶随着土壤剖面的加深，其活性减弱。
7.
Study on Soil Microbes and Soil Enzyme Activity of Hedysarum Scoparium Fish. Et Mey.
花棒土壤微生物和土壤酶活性的研究
8.
Soil microorganisms and activity of soil enzymes in mangrove
红树林土壤微生物与土壤酶活性分析
9.
Effect of Farmland Abandonment on Soil Enzyme Activities in Loess Hilly Region
黄土丘陵区撂荒对土壤酶活性的影响
10.
The ground has firmed up a lot since it was properly drained
在适当地排水之后，土地变得坚实多了。
11.
He pecked at the hard ground with a pickaxe.
他用鹤嘴锄掘坚硬的土地。
12.
It is very hard under foot when the ground is frozen hard.
土地结冻时，地面非常坚硬。
13.
They broke the hard frozen earth with picks.
他们用镐把坚硬的冻土凿开。
14.
He waived his claim to all the land west of the river.
他不再坚持对河西岸全部土地的要求。
15.
solid, marshy, stony, etc ground
坚硬的土地、 沼泽地、 多石的地.
16.
soil that is plastic when moist but hard when fired.
潮湿时柔软烧制后坚硬的土壤。
17.
converted to solid form (as concrete).
转变成坚硬的形式（例如混凝土）。
18.
The soil is firming up now that the weather is drier.
随着天气一天天干燥，土地越来越坚硬。