They are as incompatible as fire and water.
他们是水火不相容。
She's at daggers drawn with her colleagues.
她与同事们水火不相容.
Oil and water will not blend.
油和水不能混合在一起。/水火不相容。
Annie: Yes. The sacred flame rose from the water, just against the saying that "fire and water are incompatible".
安妮：对，圣火从水中升起，谁说水火不相容?
The Conflict Between Loyalty and Justice in Songjiang’s Personality;
忠义难两全 水火不相容——试论《水浒传》中宋江忠义性格的矛盾
Oh, he means well, but he's not my sort. Oil and water don't mix, no good trying.
哦，他的用意是好的，可是我跟他合不来。水火不相容，别白费力气。
People with revolutionary ideas may find themselves in collision with the forces of the law.
想革命的人会发现他们自己与法律的势力水火不相容。
Forts and churches almost always go together, and yet they're downright contradictions.
有要塞的地方，就一定有教堂，然而，这两者显然是水火不相容的。
Careful and careless are as different as fire and water.
细心和粗心就如水与火一样不相容。
Failure, like pain, is[ color=#0000 ff] alien[/ color] to my life.
失败和我，就像水火一样，互不相容。
The two countries are bitter enemies
这两个国家形同水火，互不相容。
Comments on the conflicting charater of Song Jiang in Water Margin;
水火不能相容 忠义难以两全──试论《水浒传》中宋江的性格矛盾
You'd think warlocks and paladins would hate each other what with demons and holy magic not getting along.
可能你会认为术士和圣骑士应该是水火不容的，因为恶魔和天使是不可能相爱的。
One day, the Deity of Water Gong Gong and the Deity of Fire Zhu Rong had a fierce fight, and Gong Gong was badly defeated.
有一天，水神共工和火神祝融之间发生了水火不容的战争，共工惨败。
It's not easy to set a fire going and draw it upon oneself.
放火烧身可不容易。
unfired pressure vessel
不用火烧的压力容器
The two schools weren't in no sense sharply divided and could not in no sense coexist like water and fire, only focused on Zuo Zhuan.
今古文之间绝非壁垒森严 ,水火不容 ,其争点仅在《左传》。
The elements are merciless!
——水火不留情呀!