开用英语怎么说

"How to open and use [something] in English?"

The question you've asked is quite clear. However, it seems that you want a more precise term instead of "open and use." If it's about opening an electronic device or software, you can say "turn on" or "launch." For example:

Turn on your computer/phone.

Launch the app on your phone.

If it's about using something in a specific context, you can specify it. For instance, if you're talking about cooking, you might say "use a knife/spoon/pot to cook." If it's about using language in a sentence, you can say "use a verb/preposition/adverb to express something."

Please provide more details if you want a more detailed answer.