[ xīnrútiěshí ] keep one's heart as hard as the nether millstone; have a heart of stone; one's heart against pity; one's heart is like iron or stone.; with a steelcold heart
If one person would greet another in the lift , at least the other would smile back , unless he has a heart of stone 如果邻居在电梯里跟你打招呼,除非心如铁石可以视若无睹,不然一定会至少报以微笑回礼。
2.
Here i heard myself apostrophised as a hard little thing ; and it was added , any other woman would have been melted to marrow at hearing such stanzas crooned in her praise 这时我听见他称我为“心如铁石的小东西, ”并且又加了一句“换了别的女人,听了这样的赞歌,心早就化了。 ”