坚硬的, 硬的, 难的, 艰苦的

*[hɑ:d]\na. 坚硬的, 硬的, 难的, 艰苦的, 困难的, 坚固的, 猛烈的, 艰难的, 结实的, 确实的\nad. 坚硬地, 努力地, 辛苦地, 接近地, 猛烈地, 牢固地\n【经】 稳定的, 苛刻的\n相关词组:\n as hard as nails\n as hard as the nether millstone\n be hard hit by\n be hard pressed\n be hard put to it to do sth\n be hard up for money\n go hard with sb\n hard and fast\n hard at it\n hard by\n hard done by\n hard upon\n learn sth the hard way\n run sb hard\n take sth hard\n take it hard\n Hard facts prove that...\n be in hard condition\n be hard at work\n hold on hard\n look hard at sb\n follow hard after sb\n as hard as a brick