has to不得不;已到;到了;必须
has had现在完成时
Has disappeared已经全部消失
Has Part部分为
Has abrother孩之宝
has reservation有保留
Has decided已经决定;已决定
Has children包括全部下级单位;有孩子
Of course, it has some disadvantage, especially the instability.
当然，它同时也有一些缺点，如数值不稳定。
参考来源 - 计算流体力学中的LBGK方法的理论研究（） Has is the third person singular of the present tense of have. (have)的第三人称单数现在式