彼得对突如其来的有关基思的问题应答自如，令人叹服。Peter had dealt admirably with the sudden questions about Keith.那个男人继续说着。她随口应答。The man continued talking. She answered him desultorily.她善于机智地应答。She was good at repartee....
This forms the basis for our mathematical expression for the electric field.这是电场数学表达式的基础。Mathematical physics is an almost impossibly difficult subject.数学物理是一门难得超乎想象的学科。He towers above his fellow students in mathematical...