大家都搜：
先存
1、greylisting───灰色列表，
2、preexistence───n.前世；先存在；灵魂先存
3、preexistent───adj.先在的；事先存在
4、nonexisting───不存在的
5、coexisting───adj.共存的；v.共存（coexist的现在分词）
6、existing───v.存在；（尤指在困境或贫困中）生活；被发现；（exist的现在分词）；adj.存在的；现行的
7、pre-existing───先存
8、pre-existent───adj.先在的；事先存在
9、pre-exciting───预励磁
1、The higher rate of fatal cardiovascular events with olmesartan among patients with preexisting coronary heart disease is of concern.───值得注意的是在有冠心病史的患者中，奥美沙坦引起的致死性心血管事件发生率较高。
2、Conclusions: Dedifferentiated chondrosarcoma arising in a preexisting osteochondroma is an extremely rare lesion with a poor prognosis.───结论：由骨软骨瘤转化的去分化软骨肉瘤非常少见，预后较差。
3、They allow you to mix in a wide variety of preexisting functionality.───它们可以让您坐享各式各样的现成功能。
4、These are often referred to as "super liens" , since they may take priority over preexisting liens as well as later ones.───这些常被称为“最高留置权”，因为他们超过了先前的留置权，也超过了后来的留置权。
5、During the Himalayan period, fold and superimposed deformation had been happened, and cased preexisting structure reformed.───喜山期发生褶皱叠加并进一步改造先期构造。
6、First, with base complementary, each preexisting DNA strand acts as a template for the production of a new complementary strand.───首先，对基础互补，每个既存股DNA作为一个模板，以新互补的生产困。
7、Assume client1 changes the password for a preexisting user 'u100'.───假设客户端1更改了预先存在的用户“u100”的密码。
8、If your child has a preexisting condition, insurance companies, starting this year, will not be able to deny those children coverage.───假如你的孩子有保险排除条件，保险公司在第一年将不会拒绝孩子们的保险项目了。
9、event itself may be seen as either ex nihilo or order from preexisting chaos.───事件本身可以被看作要么不可得的虚无要么来自现有混沌的法则。