不是some...other...,而是some...others...
some...others是有限定范围的,而some...the others...是无限定范围的
eg.There are 5 pencils,some are red,the others are blue.
There are many boys here,some are 18 years old,others are 20 years old.
从上述两句句子中可以看出：如果有限定范围的,比如第一句有5只笔,那么就要用some the others,如果没有限定范围,如第二句many boys一个模糊的数量,就用some others