Jim never has his dinner at 7:10.
原文意思是
JIM通常在7点吃晚饭.
给出句的意思是：JIM从不在7点吃晚饭.
Jim usually doesn't have his dinner at 7;10.这个字面意思是JIM通常不在7点吃饭.（很少这样表达）
Jim usually doesn't have his dinner at 7;10.这个不符合英文表达方式的