“难怪的”常见的英文表达有 “no wonder” 、“it's no wonder” 或 “it's not surprising that” 等，具体使用哪种表达可根据语境灵活选择：
No wonder：这是最简洁常用的表达，直接放在句首或句中，表示“难怪；怪不得”。例如：
No wonder you're tired. You've been working all day.（难怪你累了。你工作了一整天。）
He looks so familiar. No wonder, I saw him at the party last night.（他看起来好面熟。难怪呢，我昨晚在聚会上见过他。）
It's no wonder：结构上比 “no wonder” 更完整一些，常用于正式或较为书面的语境，同样表示“难怪；怪不得”。例如：
It's no wonder he didn't pass the exam. He never studied.（难怪他考试没通过。他从来就没学习过。）
It's no wonder that people are worried about the environment.（难怪人们担心环境问题。）
It's not surprising that：意思与前两者相近，但语气更为正式、客观，常用于阐述一个并不令人意外的事实。例如：
It's not surprising that the team lost the game. They had several key players injured.（这支球队输了比赛并不奇怪。他们有几名主力球员受伤了。）