1. turned back 往回走;阻挡
He turned back to his work.
他回去继续工作
。2. shut down 关闭
The computer system will be shut down over the weekend.
计算机系统周末关闭
。3. presidential run-off 总统大选
A run-off presidential election on November 8th turned sour well before results were announced.
11月8日的一场决胜选举在宣告结果之前就已然变味
。4. ruled out 排除;否决;取消
The proposed solution was ruled out as too expensive.
建议的解决方案被认为花钱太多而遭否决
。