streamline casing

例句：

1. 1. The new design ofthe car is streamlined to improve efficiency.
   这款汽车的新设计是为了提高效率而流线型的。
2. 2. The company has streamlined itsoperations to increase productivity.
   该公司已精简其运营以提高生产力。
3. 3. The engineer streamlined themachine to reduce weight and increase speed.
   工程师对机器进行了流线型设计，以减轻重量并提高速度。