22. catalysis 催化作用
23. caustic 腐蚀性的 Some chemicals are caustic by nature.
24. combination 化合 组合 The safe combination of the two chemicals required a complicated chemical process./ This is a combination of two powerful ingredients.
25. corrode 腐蚀 The metal has corroded because of rust.
26. crystal 结晶状的
27. decay 腐败 Sugar decays our teeth.
28. decomposition 腐败 分解
29. erode 腐蚀 The sea has eroded the cliff face over the years.
30. explode 使爆炸 The red balloon exploded when I popped it with a pin.
31. explosive 爆炸的 炸药 Dynamite is highly explosive. / Politics can be explosive issue.
32. gasoline 汽油
33. ignite 使燃着 A smoldering cigarette ignited the newspapers.
34. impurity 杂质
35. iodine 碘酒
36. methane 甲烷
37. neutralize 中和 Alkalis neutralize acids.
38. nickel 镍
39. nitrogen 氮
40. particle 颗粒
41. polymerization 聚合
42. scorch 使褪色 Do not leave the iron on the delicate fabric or the heat will scorch it.
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2016-02-29
2016-02-29
2016-02-29
2016-02-29
2016-02-29
2016-02-29