Flameless powder
[化] 無焰火藥
?? 詞語組成解析
[機] 無火焰的, 不起火焰的
powder
['pa?d?]
n. 粉，粉末;粉狀物質;
vt. 在…搽粉;
vi. 涂粉，變成粉末;
??? 情景例句
Fifth word, seven.
第五個字是"seven。
Every man has a fool in his sleeve.
聰明一世，糊涂一時。
It was upon this principle that the first instruments were made,
據這一原理，制造出了最初的地震儀器，