"an ineffective teacher"
"ineffective legislation"
"a futile effort"
"the therapy was ineffectual"
"an otiose undertaking"
"an unavailing attempt"
"an ineffectual ruler"
"like an unable phoenix in hot ashes"
来自柯林斯例句
来自柯林斯例句
来自柯林斯例句
来自柯林斯例句
来自《权威词典》