Until this week, every attempt to tighten up the law had failed.到本周为止，一切旨在严格执法的努力都失败了。I want us to be a bit more sensible this time and tighten up.我要求我们这次要更加理智、更加严格要求自己。It's important to tighten up the wheels proper...

tighten up的音标：tighten up的英式发音音标为：['taɪtn ʌp]tighten up的美式发音音标为：['taɪtn ʌp]...

使紧密，加强，收紧...