Bombycin

蚕素

🗣️ 情景例句

You've really been keeping an eye on quality.
你们的确在质量上下了功夫!
How big?
多大？
'Oh dear,' said the conductor suddenly.
“哎呀，”售票员突然说，
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🔤 更多 B 开头的单词

balsam of Canada
basic plan generating system
be open to
beryllium acetylacetonate
billtong
block copolymerization
born in wedlock
bouillon agar
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