新詞：

1. outage:?a period when a power supply or other service is not available or when equipment is closed down.

原文：the battery units could be used to help large customers get through the night or during unexpected outages

glut: an excessively abundant supply of something.

原文：It could capitalize on the glut in the solar cell market and avoid the large capital expenditures tied to building and running factories.

2.tack on:to add sth new to sth that is already complete, especially in a way that looks wrong or spoils the original thing

原文：utilities tend to tack on extra charges

造句：Do not tack the stuff on the wall.

復習：

1. indictment: a thing that serves to illustrate that a system or situation is bad and deserves to be condemned.

2. incremental: 增加的

3. butter up阿諛奉承? spruce up打扮整齊crank out制成

4. pledge: commit (a person or organization) by a solemn promise.

5. revamp改造，翻新，修補 fathom推測，領(lǐng)會morph變形 lard夾雜

嘮叨兩句:

這章講了SolarCity，Musk涉獵了他當初剛從畢業(yè)所預言的三大領(lǐng)域Internet, renewable energy, and space。很厲害。不過這章我很好奇的是太陽能板（硅提煉制取的過程）的生產(chǎn)是極其污染環(huán)境的，而Musk是怎么解決的？