我认识他, 但我俩并不常来常往.I know him, but we dont frequently see each other.跟你常来常往的女孩子们都爱乱花钱 吗 ?Are your usual girls very expensive?沙丘常往内陆移动.The dunes usually migrate inland....
Take, for example, the simple sentence: "The man climbed up the hill"以Themanclimbedupthehill这个简单句为例。Many factors are important, for example class, gender, age and ethnicity.许多因素都很重要，如阶级、性别、年龄及民族。There are many sources of...