To talk without thinking is to shoot without aim 啥意思?

直译：说话不思考就是没有目标的射击.
意义：不加思索就胡言乱语好比无的放矢.
语法：两个without相同,都为prep.“没有,缺乏; 在外面”,后接n./v-ing,还可用于 do without, go without 和 reckon without 等短语动词中.
is to shoot without aim(be to do sth):
1.表示按计划或安排要做的事（多用于此情景）.例如：
The Queen is to visit Japan in a week’s time.女王将于一周后访问日本.
2.表示“应该”,相当于should, ought to.例如：
You are to report to the police.你应该报警.
What is to be done?应该怎么办呢?
3.表示“必须”,相当于must, have to.例如：
The letter is to be handed to him in person.这封信必须亲手交给他.
You are to do your homework before you watch TV.看电视之前你得先做完作业.
4.表示“想,打算”,相当于intend, want.例如：
If we are to be there before ten, we’ll have to go now.如果我们要在十点前到,我们现在就得走.
5.用于第一人称疑问句,表示征求对方意见.例如：
Am I to go on with the work?要我继续完成这项工作吗?
What are we to do next?我们下一步该怎么办?
6.用于否定句,表示“禁止”,相当于mustn’t.例如：
The books in this room are not to be taken outside.这个室内的书籍不得带出室外.
You are not to smoke in the reading-room.你不可以在阅览室里吸烟.
7.表示“可以,可能”,相当于may, can.例如：
The news is to be found in the evening paper.这条消息可以在晚报上见到.
Such people are to be found everywhere.这种人到处都有.
She is nowhere to be found.在哪里也找不着她.
8.were to do sth.用于if或even if / even though从句中,表示对未来的假设.例如：
If I were to tell you that I killed him, would you believe me?要是我告诉你是我杀了他,你会信吗?
Even if the sun were to rise in the west, I would never do such a thing.即使太阳从西边出来,我也决不做这种事.
9.be to blame(该受责备,对某坏事应负责任)与be to let(待出租)两种结构中,用不定式的主动形式表示被动含义.例如：
Which driver is to blame for the accident?这事故是哪个司机的责任?
This house is to let.这房子要出租.
又及：（谚语） To talk without think be to shoot without aim.说话不思考—射箭无目标.
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