According to the video, we can use the context, grammar and （） to help us understand what others are talking about.

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• In the pricing process， in order to understand environmental factors， a company needs to（）.
• The song lyric is generally easier to understand， milder and more circuitous in tone than traditional poetry.
• This book is not（）enough for him to understand.
• I do not understand the of this book.
• You need to understand your company well so that you can do things well.