记忆方法
将“eightieth”分解为“eight”和“ieth”，想象“eight”是8个，而“ieth”是第80个，就像数数到80时的一个标记，以此来记忆这是第80个位置或第80次。
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权威例句
- 1. Mr Stevens recently cele-brated his eightieth birthday.
- 史蒂文斯先生最近庆祝了他的80大寿。
- 2. All our family came to our grandfather's eightieth birthday party.
- 我们全家和所有的亲戚都来参加祖父的八十岁寿宴.
- 3. We are going to celebrate our granduncle's eightieth birthday.
- 明天我们要给舅爷过八十大寿.
- 4. The stamps have been issued to mark the eightieth anniversary of Russia's counter - intelligence service.
- 这套邮票是纪念俄国 反 情报部门成立80周年而发行的.
- 5. Nano - particle size is only one eightieth of the hair, also known as Advanced Micro Devices particles.
- 纳米 粒子大小只有头发丝的八十分之一, 也被称为超微颗粒.