alternative

Scientists are searching for alternative sources of energy, such as wind and solar power.

(Chinese) 科学家们正在寻找替代能源，如风能和太阳能。

If the main road is blocked, we will have to find an alternative route to the airport.

(Chinese) 如果主路被封堵，我们将不得不寻找另一条去机场的路线。

As the train was canceled, our only alternative was to take an expensive taxi.

(Chinese) 由于火车取消了，我们唯一的选择就是打一辆昂贵的出租车。

The menu offers a vegetarian alternative for people who do not eat meat.

(Chinese) 菜单为不吃肉的人提供了素食选项。