词汇	Avoiding obstruction
释义	Avoiding obstruction 避障
随便看	required set required signal required software reliability required space required space character required space characterRSP required spark plug voltage Required Special Optional Features required standard required standard error of estimate required starting and completion date required statutory majority required storage required study required subdivision index required subject required subjects Required Supply Rate required take-off distance required takeoff run required test time required thickness required thrust required time requiredto