You should learn to use a hammer before you pick up a nail gun. Likewise, you should become comfortable managing classes manually before you try to use more powerful tools.

在想要使用电动射钉枪之前要先熟练使用锤子，与此相似，在试图采用更强大的自动管理工具之前也要先能自如地手动管理这些类。

youdao

Teens are not going to cooperate in being killed so the use of a knife or gun is more necessary.

十几岁的就不那么好对付了，因此用刀或枪就是必须的。

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At the end of the second season, the last bullet is used to kill Azazel, and the gun is thought to be useless. However, Ruby later assists Bobby in repairing the gun so that it can use more bullets.

在第2季末尾，柯尔特最后的一颗子弹被用于射死Azazel，众人都以为这把枪不再可用时，Bobby却在Ruby的帮助下把它修复了，并将其改良，使得柯尔特能装更多子弹。

youdao

Prof Killias cannot hide his anger with those in America who use Switzerland to illustrate their argument that more gun ownership would deter or stop violence.

BBC: Switzerland guns: Living with firearms the Swiss way

Congress was somewhat mollified about all the money that had been wasted when the Army promised to use Crusader technology in a cheaper, more deployable gun employing precision-guided rounds.

FORBES: How The Army Missed Its Chance To Modernize

The statistics may show a drop in crime across the country in the past five years, including a drop in murders by gun-wielding teenagers, but the fact is that each year more than 2, 000 Americans aged 14-17 use a gun to kill someone.

ECONOMIST: The lesson nobody learns