常見(jiàn)例句雙語(yǔ)例句High fluidity polypropylene is produced mainly by two methods, chemical degradation and new catalyst with hydrogen modulation.高流動(dòng)聚丙烯主要采用化學(xué)降解法和新型催化劑結(jié)合氫調(diào)的方法生產(chǎn)。Solid bitumen from the Northeastern Sichuan Basin is investigated by the present authors using selective chemical degradation combined with various organic geochemical analyses.采用選擇性化學(xué)降解方法并結(jié)合多種有機(jī)地球化學(xué)測(cè)定手段對(duì)川東北固體瀝青的成因進(jìn)行研究。xuebao.jlu.edu.cnThe formulation must be preserved against decomposition due to chemical degradation and protected from microbial contamination and the destructive influences of excessive heat, light, and moisture.一張配方都對(duì)抗其因化學(xué)降解而導(dǎo)致的變質(zhì)。以及防止它受到雜菌污染及過(guò)度的熱量，光能，濕氣導(dǎo)致的破壞性影響。 返回 chemical degradation