小于的用法和樣例：
例句
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一年級新生小于十八歲或大于十九歲是相當特殊的。
It is quite unusual for a freshman to be younger than eighteen or older than nineteen. -
負數的有關或表示一個小于零的數的
Relating to or designating a quantity less than zero. -
2號鐵頭球棒鐵制高爾夫球棒，其高擊斜面大于發球球棒小于3號鐵頭球棒，用于擊中遠球和長距離球；2號鐵頭球棒
An iron golf club that has more loft than a driver and less than a three iron, used for medium fairway shots and long approach shots; a two iron.
