ineffectual attempt

• 徒劳的尝试

ineffectual attempt的用法和样例：

例句

1. It is vain to attempt to root out heresy by force.
   试图用暴力消除异端邪说是徒劳的。
2. To break him in by severity would be a useless attempt.
   用严厉手段来驯服他，准是徒劳的尝试。