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- A modest and retiring man by nature, he toiled conscientiously at the duties of government, but when occasion demanded he acted the role of magnificent ruler of his Empire with pomp and ceremony. 生性谦和、喜好幽静的屋大维尽心尽职地履行治国的职责，但如果形势需要，他也会大力炫耀自己作为罗马帝国统治者的至高无上的辉煌。
- A modest and retiring man by nature， he toiled conscientiously at the duties of government， but when occasion demanded he acted the role of magnificent ruler of his empire with pomp and ceremony. 他生性谦和，不好大喜功，尽心尽力履行着治国的职责，但假如形势需要，他也会不遗余力地炫耀自己作为帝国统治者至高无上的荣耀。
- when occasion demands 遇必要时
- You must act as the occasion demands without any negligence. 你要见机而作，不可有任何疏忽。
- Again, if we have been insecurely attached we may be unable to express appropriate anger or to assert ourselves when the occasion demands it. 同样，如果我们是不安全依恋的，我们也许不能表达适当的气愤，或在情境要求我们这样做时无法理直气壮表达我们的需求。
- Such an occasion demands the most careful consideration. 这样的场合需要最周到的考虑。
- Noise smaller, suitable for relatively quiet working environment for the occasion demands. 噪音较小，适合于工作环境要求比较安静的场合。
- There is nothing wrong with acting aggressive in a macho environment: in fact, it is a sign of mental health to be able to be different people as the occasion demands. 别理会他们。在"强悍"的环境里表现得积极进取没有错：实际上，能根据环境要求，做出不同的表现，正是精神健康的标志。
- Obviously, if a foreign student is to obtain the full benefit of the foreign student adviser's knowledge and insight, the student must be willing to consult this person when occasion requires it. 显然，如果外国学生想尽量妥当地利用外国学生顾问的学识及见解，便应该在需要协助时，乐于去向外国学生顾问请教。
- Jupiter decided the most intricate questions with a nod,and a very few words and no gestures suffice for the Englishman to make his inner mind felt most unequivocally when occasion requires. 译：朱庇特只一点头就决定了最棘手的问题，而当情势所需时，英国人只需三言两语而无需比比划划，就能使人准确无误地了解他的内心世界。
- It was pure luck that he was home when we called. 非常幸运，我们打电话时他在家里。
- I was paging through a magazine when he came in. 他进来时我在翻阅一本杂志。
- The fur collar mats when it gets wet. 皮领子湿了时毛就结在一起。
- When did you begin learning English? 你何时开始学习英语的？
- When it comes to German, I know nothing. 谈到德语，我一窍不通。
- She counterfeited alarm when he confessed his love. 当他向她示爱时她假装惊讶的样子。
- People become uninhibited when they drink. 人一喝酒就会变得肆无忌惮。
- A demand note is sent automatically when the invoice is overdue. 若发票愈期未付，一张即期票据(交费通知单)便自动输出。
- It was in the days when motorcars were rare. 那是在汽车还罕见的时代。
- He left when the band began to beat out pop music. 乐队一奏起流行音乐他就走了。
