一千
grands — plural of grand
先理解核心含义，再看它在真实句子里的用法。
一千
a thousand, especially of money
He spent five grand on a vintage guitar.
他花五千美元买了一把复古吉他。
非正式用法，常指一千美元或英镑。
一千单位的货币,如美元或英镑
A thousand of some unit of currency, such as dollars or pounds. (Compare G.)
祖父母或孙子女
A grandparent or grandchild.
十与一百的乘积,即基数一千。
the cardinal number that is the product of 10 and 100
大钢琴
A grand piano
The hotel lobby featured a black grand.
酒店大堂摆放着一架黑色三角钢琴。
She saved up twenty grand for her tuition.
她为学费攒了两万美元。