having only two very unpleasant choices between a rock and a hard place

　　只能在两个非常讨厌的选项中选择，进退两难。

　　Their country is caught between the devil and the deep blue sea - their leaders cause great suffering, but an invasion aimed at overthrowing them would bring many other problems.

　　他们的国家陷入了两难的选项中，他们的领导人带来了巨大的痛苦，但是想要推翻领导人而发动袭击则会带来许多其他的问题。

　　For most people a visit to the dentist is the result of a choice between the devil and the deep blue sea - if you go you suffer, and if you don't go you suffer.

　　对于大多数人来说去看牙医是左右为难后选出的结果，如果你去，那么受罪，而如果你不去，你还是受罪。

　　2、blue and white

　　a police car; the police. (Used in cities where the police cars are painted blue and white.)

　　警车