I need a smaller size for this shirt.

我需要这件衬衫的更小号。

Use a smaller aperture to increase the dof.

使用较小的光圈以增加景深。

Waterpower plants have a smaller environmental impact.

水力发电站对环境影响较小。

Each subtree is a smaller tree within the larger tree.

每个子树都是大树中的一个小树。

Homo erectus had a smaller brain capacity than modern humans.

猿人的脑容量比现代人类小。

This jacket is a bit loose, you need a smaller size.

这件外套有点肥大，你需要小一号的。

She scoffed at the idea of moving to a smaller house.

她嘲笑了搬到更小房子的想法。

She had to rehome her parrot when she moved to a smaller apartment.

她搬到更小的公寓后不得不重新安置她的鹦鹉。

The company is subcontracting part of the project to a smaller firm.

公司正在将项目的一部分分包给一家小公司。

Choosing a smaller car often involves a tradeoff between fuel efficiency and space.

选择一辆小车通常涉及燃油效率和空间之间的权衡。