The headstrong impetuous man rushed into things without forethought.

这个顽固的莽汉，不预先考虑，仓促行事。

youdao

For example, you wouldn't just change from JDBC to EJB without some long meetings, a ton of planning, and an enormous amount of forethought.

比如，没有经过漫长的讨论会、数以吨计的计划和大量的深思熟虑，您不会轻易地从JDBC转移到EJB。

youdao

He does not mean that we are not to take forethought and that our life is to be without plan or method; but that we are not to worry about these things.

主的意思并不是说：我们用不着预先思想，我们的生活可以毫无计划、毫无规律；祂乃是说：我们用不着为这些事挂虑。

youdao

He says most gun deaths are classified as manslaughter, which implies a crime committed without forethought.

BBC: US gun debate: Could Obama's guns plan work?

But Mr Bush's barging into Iraq without adequate forethought has resulted in a debacle.

ECONOMIST: America and Iraq