Wind it like a watch with a key that's stored underneath the barrel, and when it's 'fully loaded' use your thumb to pull back the safety lever. Then squeeze the trigger.

用放置在枪管底端的转柄给它像手表一样上发条，当发条“全部上满”之后，用你的大拇指向后拉动枪栓，然后扣动扳机。

youdao

Then I pull the trigger.

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If, on the other hand, the president is able to convince voters that Kerry just doesn't have the stomach to pull the trigger, then swing voters in Arizona, Florida and elsewhere may quickly decide that they can't trust "the liberal Massachusetts senator" the next time the country comes under attack.

CNN: story.ford.jpg