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重点讲解：
1. in honor of 为庆祝…；
The Foundation is holding a dinner in honor of something or other.
基金会正举办某个纪念宴会。
2. derive from （使）起源于；（使）来自；
Their numerical system, derived from the Babylonians, was based on multiples of the number six.
他们的数制源自古巴比伦人，以数字6的倍数为基数。
3. set off 动身；出发；启程；
They set off at a leisurely pace.
他们步态悠闲地出发了。
4. when it comes to 谈到；涉及；
No one can touch him when it comes to interior design.
在室内设计方面，没有人能比得上他。
n. 半球
