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为什么 B 族维生素有 B1 B3B5 B6 B7B9 B12,却没有 B4 B8 B10 B11 这些编号?

intermediate知乎1 min read
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Key Vocabulary

HSK5

nationality

quèHSK4

even though

编号biān hàoHSK7

serial number

热度rè dùHSK6

(coll.) a temperature (i.e. abnormally high body heat)

yǒuHSK1

(bound form) having; with; -ful; -ed; -al (as in 有意[you3 yi4] intentional)

为什么wèi shén meHSK2

why?

wànHSK2

ten thousand

维生素wéi shēng sùHSK6

vitamin

这些zhè xiēHSK1

these

没有méi yǒuHSK1

to not have

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为什么 B 族维生素有 B1 B3B5 B6 B7B9 B12,却没有 B4 B8 B10 B11 这些编号? - ISCBJ