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繊維光学: fiber optics (US), fibre optics (UK)
Fiber optics is a part of communication technology.
鉱物学: mineralogy
He is an expert in mineralogy.
酵素学: enzymology
He is an expert in enzymology and conducts many researches.
high and low
His mood is always fluctuating high and low.
object produced by a craft (skilled practice), a handicraft
This craft object requires very delicate handmade techniques.
rainbow
Have you ever seen a rainbow in the park?
leaving school for the day
I plan to go out and play with my friends after leaving school today.
to leave school for the day
I left school with my friends today.
flash of lightning / electric light
A flash of lightning illuminated the sky.
official telegram
He announced his marriage by official telegram.
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