1)adventitious,uncertain,inconstant,不定的2)statically indeterminate,静不定的3)changeable speed,不定的速度4)indefinite weight,不定的权函数5)indefinite weight,不定的非线性项6)indeterminate direction load,方向不定的负荷
用法例句
So if the teacher wants to give a successful class, he should try his best to make the class colorful through controlling the tempo, such as the changeable speed, the density of the information, pace, etc.