armor; first of 10 heavenly trunks 十天干; first in order; letter "A" or roman "I" in list "A, B, C", or "I, II, III" etc; first party (in legal contract, usually written 甲方, as opposed to second party 乙方); methyl[cedict]
化学
huà xuéㄏㄨㄚˋ ㄒㄩㄝˊ
chemistry; chemical[cedict]
合成法
hé chéng fǎㄏㄜˊ ㄔㄥˊ ㄈㄚˇ
(chemical) synthesis[cedict]
的
deㄉㄜ˙
díㄉㄧˊ
dìㄉㄧˋ
of; structural particle: used before a noun, linking it to preceding possessive or descriptive attributive[cedict]