n.雪球；打雪仗；滾雪球式的募捐法
v.向 ... 丟雪球；使生長或快速的增長
He was hit by a volley of snowballs. 他被一陣投來的雪球擊中了。
We like having snowball fights in winter. 我們喜歡在冬天里打雪仗。
用作動(dòng)詞 (v.)Orders for the new product have begun to snowball because of our new ad campaign. 由于我們的新的廣告促銷活動(dòng)，新產(chǎn)品的訂貨單開始像滾雪球一樣迅速增多。
