Bare Soil Areas: a firm, crumbly consistency to the seedbed is preferred.

裸土区域：苗床适宜一种牢固，疏松连续的土壤。

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The results show that there only exists the geometrical drift of sedentary minerals without firm connection among the pure soil particles.

研究结果表明，纯土的土颗粒之间只有原生矿物的几何堆积，而没有牢固的连接。

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With her trowel she turned the soil over and over, and smoothed it and patted it firm.

她用泥铲把土翻了又翻，又弄平，再拍结实。

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Nautilus would use massive robotic machines, which are being built in Wallsend, near Newcastle-upon-Tyne, by a firm with long experience of marine engineering, Soil Machine Dynamics.

BBC: UK Seabed Resources joins deep-ocean mineral-mining rush