"foods indispensable to good nutrition"
"essential tools and materials"
"funds essential to the completion of the project"
"an indispensable worker"
"the routine but indispensable ceremonies of state"
来自柯林斯例句
来自《权威词典》
来自《现代英汉综合大词典》
来自《简明英汉词典》
来自《简明英汉词典》