例句
a hard wooden chair
一把硬木椅
the hardest substance known to man
已知的最硬物质
After months without rain, the ground was too hard to plough.
数月无雨，土地坚硬难犁。
a hard wooden chair
一把硬木椅
the hardest substance known to man
已知的最硬物质
After months without rain, the ground was too hard to plough.
数月无雨，土地坚硬难犁。