black-ink balance的用法和樣例：
例句
- Our account is nicely in the black this month.
我們的帳上本月頗有盈餘。 - Having overpaid the bills, I had a balance of credit in my card.
因多付了賬單款，我的卡上出現了盈餘。 - We had a very favourable international trade balance last year.
我國去年有很大的國際貿易順差。 - A nation's balance of trade is favorable when its exports exceed its imports.
當出口額大於進口額時，一個國家的貿易就會出現順差。
