topsoil

过去分词：

动词过去分词: topsoiled

更多词形：

动词过去式: topsoiled | 动词过去分词: topsoiled | 动词现在分词: topsoiling | 动词第三人称单数: topsoils |

单词例句：

Located on a prehistoric lake bed, which accumulated nutrient-rich sediment, contributing to the fertile topsoil.

农场建立在史前湖床之上,这里积聚了富含营养的沉积物,形成了肥沃的表层土。

Topsoil is being lost to erosion, and arable land is being lost to desert, to salinization, and to urbanization.

表层土因为侵蚀而正在失去，可耕种的土地正在变成沙漠，被盐化，被城市化。

In the absence of successful efforts to stem the loss of topsoil, the social effects of erosion will probably first be seen in Africa.

在控制表土流失的努力缺乏成效的情况下,土壤侵蚀的社会影响将可能首先出现在非洲。

In many countries the loss of productive topsoil has contributed to growing food deficits.

在许多国家里，生产性表土的流失已导致日益严重的粮食短缺。

Wind eroded the loose topsoil.

风侵蚀了稀松的表土

This topsoil tends to wash away.

表层土壤要冲掉了。

When the black topsoil was all washed away, farmers moved westward and started new plantations.

当表层黑土全部被冲走之后，农民们就向西部转移，建立新的种植园。

A chisel plow, meanwhile, only fractures the topsoil and preserves more surface residue.

用凿犁耕田则只会松开表土，保留较多的作物残株。

The auxiliary shaft topsoil adopted ordinary construction and drainages in hygrometric well.

屯留煤矿副井井筒表土段采用普通法施工,利用井外降水井疏干降水。