thinking;scheming ;
例句:
The real-time dynamic mathematical model for an core engine is established using component modeling technology.
采用部件建模技术,建立了某型发动机核心机 实时 动态数学模型.
He tried in vain to get to the teacher to pass the test.
他企图贿赂老师让他过关却白费心机.
The drowning man called in vain for help.
溺水者白费心机地呼救.