Rich gifts wax poor when givers prove unkind. —— Shakespeare
    如果送禮的人不是出于真心，再貴重的禮物也會(huì)失去它的價(jià)值。 ——莎士比亞
    wax here means to increase gradually in size, number, strength, or intensity,是指變大，增加在大小、數(shù)量、力量或密集度上逐漸增加的意思。
    It also means to show a progressively larger illuminated area, as the moon does in passing from new to full.是指漸滿顯出逐漸變大的光亮區(qū)域，如月亮由新月到滿月。
    wax and wane （月亮）盈虧，圓缺，也可以指興衰的意思。
    我們說(shuō)的冬瓜就是wax gourd.