不知道怎么做

without a hitch───顺利无阻地；轻易地

without (a) doubt───毫无疑问

without a murmur───毫无怨言地

without cease───不停地，不断地

without demur───无异义的

without doubt───无疑地；确实地

without fail───务必；必定，无疑

Service oriented architecture without a clear vision how to make it real using agile development principles is a waste of time and money.───SOA要是不知道如何利用敏捷原则使目标成为现实，将会浪费时间和金钱。

you don't do that without a model of how you are going to be successful.───你也不会在没有成功的模型下开始。

A man was pushed out of an airplane, without a parachute. How was he able to survive?───一名男子没背降落伞就被推下飞机。在什么情况下他死不了？