推辞: to decline (an appointment, invitation etc)...
祸害: disaster, harm, scourge, bad person, to damage, to harm, to wreck...
循序渐进: in sequence, step by step (idiom); to make steady progress incrementally...
成为: to become, to turn into...
大批: large quantities of...
枯燥: dry and dull, uninteresting, dry-as-dust...
液体: liquid...
剩: to remain, to be left, to have as remainder...
原理: principle, theory...
原谅: to excuse, to forgive, to pardon...
