燕子衔泥垒大窝
yàn zi xián ní lěi dà wō
the swallow's nest is built one beakful of mud at a time (idiom)
many a little makes a mickle
ReviewReviewyàn zi xián ní lěi dà wō
the swallow's nest is built one beakful of mud at a time (idiom)
many a little makes a mickle