1.split into 分成

Its evolution can be crudely split into three periods.
它的发展可以大致分成三个阶段。

The group eventually split into three segments, relegating distinct roles and tasks.
帮会最终分裂成三个阵营，归入不同的任务和角色。

2.show off 突出；炫耀，卖弄

I love to show off your photo samples.
我喜欢拿用你拍的照片来炫耀。

Like many people, birds sing to show off.
和许多人一样，鸟用鸣唱来卖弄自己。

3.operating system 操作系统

It also ran linux, a free operating system.
它预装的是开源的操作系统linux。

Directx does not install on current operating system.
当前系统未安装directx
4.as if 好像， 似乎， 仿佛

He acted as if he had nothing to learn.
他表现得好像没有东西可学一样。

It was as if time stopped in burma.
那一刻的缅甸，时间仿佛停止。