推荐回答（4个）
坚硬:
1. hard
2. solid
Relative explainations:
Examples:
1. 黑檀树是一种黑色而坚硬的树木。
Ebony is a hard black wood.
2. 金刚砂是非常坚硬的金属物质。
The emery is a hard metallic substance.
3. 烧热的钢淬火使它坚硬。
Hot steel is quenched to harden it.
4. 冰象石头一样坚硬。
The ice is as hard as rock.
坚硬的岩石
sound rock
坚硬的颚
a jaw of flint.
钻穿坚硬的岩石
bore through solid rock
不会碎裂的坚硬蛋糕
a solid cake that won't crumb.
不会磨损的坚硬表面
a hard surface that won't scuff
一种木质坚硬的树
a hard - woodedtree
肯特郡产坚硬砂质石灰岩
Kentish rag
海龟有着坚硬的壳。
A turtle has a hard shell.
有一层坚硬冰面的雪
snow with a firm crust.
坚硬的土壤；难以除去的污点
stubborn soil; stubborn stains.
软:
1. soft
2. flexible
Examples:
1. 花园里的泥土松软肥沃。
The earth in the garden is good, soft soil.
2. 春天的时候，踩在松软的地面上非常舒服。
It's very comfortable to step on the soft ground in the spring.
3. 小猫的爪子很软。
The kitten has very soft paws.
4. 石墨是一种软而黑的物质。
Graphite is a soft black substance.
5. 这管子柔软但很坚固。
This tube is flexible but tough.
6. 软饮料中含有二氧化碳。
Soft drinks contain carbon dioxide.
7. 松木是软木，柚木是硬木。
Pine is a soft wood and teak is a hard wood.
8. 他老是把钱借给她，心肠也太软了。
He's always lending her money; he's too soft-hearted.
软皮
supple leather
软沥青
mineral tar
心肠软
a tender heart.
磁软的
magnetically soft
面包软壳
kissing crust
软塑料磁盘
floppy disc
后软翻
back walkover
软封面的书
soft - bound books
半软的干酪
semisoft cheese.
过软的黄油
runny butter
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