lot no./best by:2175dl7176请问这段英文字母和数字是什么意思

Lot No/Best By lot no./best by:2175dl7176请问这段英文字母和数字是什么意思 lot No./Best By:D97591 10/12什么时候过期? LOT NO best by I think the best way to learn English is by reading _English magazines .I've learnt _that way .A lot of ;a lot B lots of ;a lot of C lots of ;a lot D a lot of ;lots of 下面两句语法正确吗?I have a lot of good friends,but not the bestI have a lot of good friends,but no the best No best ,Only better. do the best by best by :12 菲律宾的7D芒果干的,打印的有效日期,BEST BEFORE ：11JAN12 LOT NO：A2-L-010111菲律宾的7D芒果干的,打印的有效日期,BEST BEFORE ：11JAN12LOT NO：A2-L-010111 By a pained look,I saidno,because my left legas hurt a lot这句话哪错啦? 这句话中：a European country is trying to change that by building schools that have no classrooms,nosubjects lessons and best of all,no grades中best of all 额classorms后面是no 请教use by end是“有效期至”的意思吗?因水平低,产品包装上的英文看不懂,请各位赐教 use by end:和Lot No the woman gathered a lot of( )by writing many best-selling（ ）A.weaths ,work B.wealths,works C.wealth,work D.wealth,works LOT NO 一般写什么的? By bus?No,by car. no best only better是什么意思