...适用，但是一般引人争议的是水田对于地下水的补注量是否显著，因为台湾许多水田在长期耕作后，在土层中产生一层硬盘（hard pan），其水力传导系数甚小，对于地表水份往地下水的渗漏补注，如同一层阻水层，因此水田的渗漏量在有硬盘的情况下，对于地下水补助的...
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硬土 firm bottom; firm ground; firm soil; hard bottom; hard pan; hard soil; pan soil; shot soil 土层 solum; true soil; pedosphere; soillayer; soil horizon; soil layer .
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N a hard impervious layer of clay below the soil, resistant to drainage and root growth 硬质地层
Uitra light saucepan and frying pan made of hard-anodised aluminum for greater durability and easier cleaning.
这款超轻炖锅和平底煎锅均由硬制氧化铝材料制造，因此更加耐用，同时更便于清洗。
"Yes, I ain't no invalid," he said. "When it comes down to hard - pan, I can digest scrap-iron."
“是的，我身子骨不坏，”他说，“日子难过的时候我是连碎铁也能消化的。”
At that time, life was pretty hard for Pan Dalin, he was down and out, struggling a living hardly by borrowing from others.
那时的潘大临生活非常贫寒，靠着借贷艰难地生活着。
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