less是little和few的比较级，是一个形容词，形容词后面应该加名词短语，或者跟在be动词后面当表语。如果形容动词的话应该放在动词后面，比如：I like her less than before.
我没有以前那么喜欢她了。
We have less to worry about now.
现在我们要担忧的事少一些了。
He lost by less than one second.
他以不到一秒钟的差距输了比赛。
We are eating more and exercising less.
我们吃得更多，锻炼得却更少。
Maybe we'll hear a little bit less noise.
也许我们听见的`噪音会少一点。
In practical terms , it means spending less.
具体点说，那意味着少花些钱。
The repaired sail lasted less than 24 hours.
修好的帆只维持了不到二十四小时。
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