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- 一旦once
- 双生twins
- 一旦定了日期，我就会告知你们，以便你们早安排日程，早定机票。As soon as we have a date set I'll let you know so you can circle your calendar and make you plane reservations.
- 双生铰链gemel hinge
- 一旦开始，就必须继续。Once you begin, you must continue.
- 同卵双生identical twin
- 对不起，开始时我干得太慢了，不过一旦我完全上轨道，我会干得快得多。I'm sorry I've made such a slow start but I'll be much quicker once I get fully into my stride.
- 双生儿法twin method
- 野兽一旦陷于绝境就会变得很危险。The animal is dangerous when cornered.
- 单卵双生monovular twins
- 一旦吸毒，永远也戒不掉了。Once you smoke up you'll never give up.
- 异卵双生的双胞胎nonidentical twins.
- 一旦你进入社会,就不能总是凭本能行事。You should not always follow your nose once you step into the world.
- 双生泵twin pump
- 一旦他故去, 希拉就会继承这笔钱.In the event of his death Sheila will inherit the money.
- 双生斑twin spot
- 他一旦作了决定就不会轻易更改。He was inflexible once he had made a decision.
- 双生波twin wave
- 造城累代，毁城一旦。An age builds up cities; an hour destroys them.
- 双生的twin
