no less than和not less than区别
—Considering its relatively small size and unique design, is it safe to ride this segway？
—Of course. Tests suggest it is ______ safe than any other regular electromobile type.
A. no less than B. not less than
no less than 的意思是“不亚于，与......同样地”，not less than 的意思是“至少，有过之无不及”，试比较：
(6)There were no less than a thousand people at the meeting.到会的有1，000人之多。
(7)There were not less than a thousand people at the meeting. 到会的至少有1，000人。
(8)She is no less beautiful than her sister. 她和她的姐姐一样美丽。
not less ... than 的意思和 not less than 相仿，如：
(9)He is not less rich than you are. 他至少和你一样富有。
（以上内容全部摘自《薄冰英语用法1144例》pp.689-690）
—Considering its relatively small size and unique design, is it safe to ride this segway？
—Of course. Tests suggest it is ______ safe than any other regular electromobile type.
A. no less than B. not less than
Tests suggest it is no less safe than any other regular electronmobile type.
参考译文：测试表明它与其它常规的/普通的电动汽车类型是一样安全。（强调2者具有同等安全性）
(1)如果纯粹表示比较，就选用not less safe than
(2)如果表示对2者的肯定，就选用no less safe than
根据句子意思：是表示对2者肯定，A和B 一样安全
A: no less than 有两个意思：
(1) 表示“多达”、“有……之多”(强调数量之多)。
no less than+基数词+名词不亚于，竟达……之多(≥后面数词)
The audience was no less than five thousand.
听众有五千人之多。
That hotel probably costs no less than 20 dollars a night.
那间旅馆的住宿费大约要20元一晚呢。
We walked no less than three miles.
我们走了 3 英里之远。
We won no less than ￡500 in a competition.
我们在一次比赛中就赢了 500 英镑。
(2) 表示“简直”、“与……没差别”
no less than +名词 意思“简直就是...和...一样”
It is no less than robbery to ask for so much.
要这么多，简直跟抢劫没两样。
B. no less ... than 意为“与……一样”、“不比……差”(强调两者具有同等性)。
no less +adj.+than 意思“不比...差，和...一样”
He is no less wise than you.
他跟你一样聪明(他并不比你笨)。
A dolphin is no less a clever animal than a dog is.
海豚与狗同样都是聪明的动物。
注意比较：
A whale is no more a fish than a horse is.
马不是鱼，鲸也不是鱼(即鲸不是鱼就如同马不是鱼一样)。
C:not less than 意为“不下于”、“至少”。
not less than+基数词+名词不比……差，至少 (≤后面数词)
I'll stay here not less than three days.
我将待在这里至少三天。
注意比较：
He has no less than seven daughters. (强调女儿数量之多含义）
他有七个女儿之多。（有多达的含义；即等于含义）
He has not less than seven daughters. （没有女儿数量很多，或者很少含义）
他至少有七个女儿。（有不少于或者至少的含义；即大于或者等于含义）
D:not less than 意思”没有比…更少；至少与…一样”
not less+形容词+ than+ 意为“没有比…更少；至少与…一样”。等于“at least as ... as”
She is not less beautiful than Mary.
她至少和玛丽一样美丽。
He is not less interested in composing music than Jane.
他至少跟珍一样对谱曲很感兴趣。
He is not less handsome than I. 他至少跟我一样潇洒。
比较下面2个句子
She is not less beautiful than Mary.=She is at least as beautiful as Mary.
她至少也和玛丽一样漂亮。（不一定有2者都漂亮含义）
She is no less beautiful than Mary.=She is as beautiful as Mary.
她和玛丽一样漂亮。（一定含有两者都漂亮含义）
我知道no less than表示两者都，但是我的问题是究竟这题可否用not less than? 我注意到你的解释里有一条not less+形容词+ than+ 意为“没有比…更不；至少与…一样”。等于“at least as ... as”请问这题用这个解释怎么就不对？
at least as ...as 至少和...一样的意思。
A be not less +adj. than B A至少也是和B 一样，A 没有比B 更不...
Tom is not less clever than Mike.
汤姆至少和麦克一样聪明。
如果还不理解，我在给你举2个例子加以说明
(1) This song is no less popular than that one.
参考译文：这首歌曲受欢迎程度不亚于那首歌曲。
参考译文：这首歌曲和那首歌曲一样受欢迎。
（纯粹表示对2者的肯定，即2者都受欢迎.）
(2) This song is not less popular than that one.
参考译文：这首歌曲受欢迎程度没有那首歌曲差。
(纯粹表示一种比较，不一定2首歌曲都受欢迎）
备注：
A:no less than +数词+名词 与no more than +数词+名词，刚好相反。
(1)no less than +数词：强调数量之多，意思“多达as many as含义”
He has no less than seven books.
他拥有的书籍多达7本。（很多含义）
(2)no more than +数词：强调数量至少，意思“仅仅only含义”
He has no more than seven books.
他仅仅只有7本书。（很少含义）
A:not less than +数词+名词 与not more than +数词+名词，刚好相反。
(1)not less than +数词：强调不少于/不低于，意思“至少at least含义”
He has not less than seven books.
他至少有7本书。（没有很多或者很少含义）
(2)not more than +数词：强调不超过，意思“最多at most含义”
He has not more than seven books.
他最多有7本书。（没有很多或者很少含义）