She gave him a bright, determined smile which seemed unnatural.她对他开朗、坚定地一笑，但笑得有点不自然。I consider activities such as jogging and weightlifting as unnatural.我认为像慢跑、举重这样的运动不符合自然规律。The aircraft rose with unnatural speed on tak...
她渴望把自己的发现用到商业上.She was keen to exploit her discovery commercially.人们指责他在商业上投机取巧.He was accused of commercial opportunism.在商业上迅速的回复是必要的.In business, a prompt reply is imperative....