I promised my girlfriend a gold necklace for her birthday, but when the jeweler quoted a price for one we liked, I let out a long, low whistle.

• 我答应女朋友过生日时送她一根金项链，但是当珠宝商报了我们喜欢的那个的价格时，我发出了一声长长的低沉的口哨。