I can tell just by looking at him that I won't like him.如何翻译

tell: 在这里指知道,断定的意思.
by doing sth: 凭, 靠.
I 主语；can tell 谓语；by looking at him 状语；that I won't like him 宾语.
整句翻译：
只凭看他一眼,我能断定我不会喜欢他.