Hi, I am currently trying to figure out how to correctly hyphenate, if it needs to be hyphenated at all, the following phrase: According to the rules that I have found, I assumed it should be written in the following manner: a prototype hydrogen-fuel-cell-powered remote-control toy car However, I found the following rule: do not use a hyphen in most chemical expressions, even when the terms are used as modifiers. I also looked at the box containing the car and the company did not hyphenate fuel cell powered car. But, the manufacturer also used the word insure instead of ensure, so the box does not seem an appropriate guide in this situation.
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