1.Many companies promise that you will nail the interview through their training.
许多公司承诺，经过他们的培训，你一定会在面试中表现出色。
nail:
(transitive, slang) To accomplish (a task) completely and successfully.
2.Ruth runs a tight ship and has no time for shirkers.
鲁思执行了有效的严格管理，员工没有办法开小差。
tight ship:
(idiomatic) a well-organized and highly disciplined organization
Usage notes:
Generally in the form "to run a tight ship".
3.This is a private deal. We don't have to do everything by the book.
这是一笔私人交易，我们不必照章办事。
by the book:
(idiomatic) In a manner which adheres strictly to rules, legal requirements, or official procedures.
