- 丁(nail; spike)
A nail driven straight down looks like the character for nail or the fourth of the heavenly stems.
butyrolactone
Butyrolactone is an organic compound.
butyrolactone
Butyrolactone is an organic compound.
A nail driven straight down looks like the character for nail or the fourth of the heavenly stems.
Inside a fence, something that has already gone in becomes what is enclosed.
A nail driven straight down looks like the character for nail or the fourth of the heavenly stems.
Inside a fence, something that has already gone in becomes what is enclosed.
butyrolactone
butyrolactone
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