头难，读音是tóu nán，汉语词语，意思是凡事开头难做。
万事开头难 "The beginning is the most difficult part." ; The first step is always the hardest ; It is the first step that costs. / The first step is the hardest ; Aller Anfang ist schwer
万事起头难 It is the first step that is troublesome ; a tough get-up
萦绕心头难以忘记 haunt
缬头难解 Difficult to untie the knot
爱在心头口难开 As Good As It Gets ; Love memories stubborn
凡事起头难 All things are difficult before they are easy
大难临头 Catastrophe ; Apocalyptic ; Misfortune
回头太难 Hard to retract ; The Point Of No Return ; Darkgift ; Too Hard to Turn Back
斡难河源头 onon river
那就意味着如果一头熊想要追击猎物，那么即使是世界短跑纪录的创造者尤塞恩博尔特也难以幸免于难。
That means if a bear decides to give chase, even Usain Bolt, the world record sprinter, could not outrun it.
你们工作到三更半夜，盘根错节的论文一再地让你们在找出解决方法还是一头钻进研究之间弄得进退两难。
You are working well past midnight, the thesis turned into a maze and you constantly are Tom between wanting to find the way out or in.
碳粉头更可清除镜片上难清洁的指印、油污等顽固污渍，且不会刮花、损伤镜头；
Powdered carbon can clean away fingerprint, oil stain on lens, and do not scratch or damage lens.
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