你们不必在这些东西上花什么功夫；你们不必搞个枪架，你们不必在枪上装什么准星，你们连瞄准都没有必要。
You don't have to take any pains at all with them; you don't have to have a rest, you don't have to have any sights on the gun, you don't have to take aim, even.
准星：枪炮口上，瞄准用的小圆金属突起，如来福枪上的准星。
A small metal knob on the muzzle of a firearm, such as a rifle, used for sighting.
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