中英成语俚语800对013：半途而废
半途而废 Drop(fall) by the way side. Not go the whole hog.
eg：It is silly to do things by halves.
中英俚语俗语来源：礼记：“君子遵道而行，半途而废，吾弗能已矣。”
反义词：坚持不懈 Stick it out