For the last five years, the fastest-growing job in the US has been solar installer.

过去的五年里，美国增长最快的工作是太阳能工。

We need green building retrofitters and wind turbine installers and bike lane planners.

我们需要绿色建改造人员、风力涡轮机人员和自行车道规划人员。

In the past lesson, I used the example that the window installers were very professional.

上一课，我用了的例子，窗师傅很专业。

If the window installers had broken the window and left broken glass on the ground and tracked mud into your house when they were going in and out, we would say that they were very unprofessional.

如果窗的人进出时打破窗，把碎玻璃留地上，把泥巴带进你的房子，我们会说他们很不专业。