要在竞争激烈的商业世界中生存，你需要意志坚强。

You need to be ___tough to survive in the competitive world of business.

这本书讲述了一个永不放弃的、意志坚强的渔民的故事。

The book tells the story of a ___tough fisherman who never gives up.

尽管面临许多个人挫折，她仍然非常坚强，并专注于自己的目标。

Despite facing many personal setbacks, she remained remarkably ___tough and focused on her goals.