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破產(chǎn)...

n.改進者，提高的人，改良物...

improver的音標：improver的英式發(fā)音音標為：[?m'pru:v?]improver的美式發(fā)音音標為：[?m'pruv?]...

Aim To synthesize new type of octane number improver for gasoline, methoxyisobutyrate.目的合成一種新型汽油辛烷值改進劑─甲氧基異丁酸烷基酯.Cetane improver . Makes the engine run better at higher compression settings.碳氫化合物的改進物. 使引擎在高壓縮比時運轉(zhuǎn)較為順暢.Cyc...

improverishment的音標：...