Euler’s Generation of Fermat’s Little Theorem

(S，S)-(+)-Tetrandrine

(S) -piperazine-2-carboxylic acid

(S )-3-hydroxy- γ-butyrolactone

(R) and (S) 4 methyl 4 octanol

(R) and (S) 4 methyl 4 heptanol

(pere)David’s deer

(pere) David’s deer

( S )-malic acid anhydride

( S )-2-aminobutanol

( S )-1-Phenylethanol

To conceptualize(a text’s meaning)to meet the intent of the author (yi yi ni zhi)