只要……就；只是在……的时候；只有

只要…就; 只有，只有当…; 除非

nonlyric───非抒情的

only too───非常；实在

only way───唯一方法

only child───独生子女

only thing───唯一的事情；仅有的事情

only hope───只有希望

only just───刚刚才；恰好

to lay in───躺下

Only if we handle them with kid gloves.───只要我们小心行事就行了.

You can make progress only if you are modest.───惟虚心乃能进步.

Positive semi - definite matrices are positive definite if and only if they are nonsingular.───正半定矩阵是正定的,当且仅当它们是非奇异矩阵.

Only if the red light comes on is there any danger to employees.───只有红灯闪亮时才有危及职工的险情。

The two sides will clash there only if Chelsea beat Sunderland in their quarter-final replay.───只有切尔西队在四分之一决赛的重赛中击败桑德兰队，双方才会交锋。

Thick accumulations of peat can form only if the swamp basin slowly subsides.───只有当沼泽盆地慢慢下陷时,厚厚的泥炭堆积才能形成.

The meat market can continue only if it is radically overhauled to conform with strict European standards.───肉类市场只有经过彻底的大检查，严格遵守欧洲标准，才能继续营业。

Syria will attend only if the negotiations deal with issues of substance.───只有在谈判涉及重大问题时叙利亚才会参加。

The remarkable part of Karatowski's theorem is the " only if " part.───库拉图夫斯基定理的卓越部分在于他的 “ 仅当 ” 部分.

Only if the red light comes on is there any danger to employees.───只要红灯一亮,就表示有危及职工的险情.

Only if he turns over a new leaf.───除非他重新做人.

Political attacks work only if they find an echo with voters.───政治攻击只有在选民中引起共鸣才会有作用。

Children are admitted only if accompanied by an adult.───儿童必须有成年人陪同方可入场。

The after effect occurs only if the additive is present during irradiation.───在辐照过程中只有当添加剂存在时才出现后效应.

I told him I would work for him only if I could have a finger in the pie.───我告诉他我愿为他工作,只要让我参与此事.

The placebo effect can be understood only if we acknowledge the unity of mind and body.───只有我们承认身心一体，安慰剂效果才能被理解。

The lawyer is paid only if he wins.───律师只有打赢官司才会被付费。

I'll do that, but only if we set a few rules.───我可以干, 但我们得定几条规矩.

They recognized that the country would revive only if it thoroughly disengaged from the chaos of the old regime.