optimal: the best or most suitable for a particular purpose or in a particular situation
optimal是形容词:最优的，最理想的，有时候还可以拼写成optimum,意思和用法不变。一般optimal 可用来形容时机、条件、解决方案、结果等，常和替换best 和 ideal. 在口语和写作中均可运用。
Although some British universities require a minimum IELTS score of 6.5 for admission, 7.5 would be optimal for those who want to have an edge.
有些户型不是方方正正的，实用面积有限，如果室内设计巧妙，充分利用了空间。
This interior design makes the optimal use of the available space.
最优的解决方案应该是用最少的预算和时间完成项目。
The optimal solution is to use as little and time as possible to get the project done.
《经济学人》
A carbon price is indeed the optimal way to reduce pollution, but getting people to pay for carbon has been a vote-loser in American and Europe. [应对气候变化]
SkySails kite is launched, like a recreational kite, into the wind at the ground level. Then, as the kite is pulled up by the wind while being manipulated to travel in a series of figures-of-eight in order to achieve a constant, optimal speed, the tether uncoils, spinning the drum.【新能源】
They compute an optimal tax rate of 1-2 cents per ounce of soft drink in America. Taking this into account they reckon that the optimal rate for cities is 0.5 cents, although a more efficient system would be a state or national tax to control America's sugar rush. [美国对含糖饮料征税]
应用：
1）翻译：一些应用更多关心的是最佳用户的体验，而不是不顾一切的增长。
Some apps are more concerned about ensuring optimal user experience than pursuing relentless growth.
2) 造句：留在学术界是她当下最好的职业选择。
Staying in academic is her optimal choices for her career path at present.
