例句與造句

1. for each non-null variable-length field, the record header contains the length of the column in one or two bytes
   對于每個非空的變長字段，記錄頭使用一或兩個字節(jié)包含了列的長度。
2. It's difficult to find variable - length field in a sentence. 用variable - length field造句挺難的