hollows/ˈhɑː.loʊ/名词坑，洞Sleepy Hollow睡谷/ˈhɑː.loʊ/形容词（局面、情感或言语）无价值的，空洞的，虚伪的Even sex had become a hollow pleasure.甚至连性都变得无聊起来。（声音）空洞的，低沉的a hollow sound低沉的声音空的，空心的a hollow log空心的原木想跟读，去练习
