I've signed a wonderful major book contract.

我签了一个出书的合同。

His second major contract followed hard upon the first.

【hard】紧接着第一个大合同，他又签下了第二个。

There's complicated twists and turns, but it ended up really hurting France because Australia cancelled a major submarine contract with France.

这其中有复杂和曲折，但最终却伤害了法国，因为澳大利亚取消了与法国的一项重要潜艇合同。