The idiom "that's a stretch" means that something is difficult to believe or hard to accept. It is often used when someone makes a statement or a claim that seems unlikely or far-fetched.
For example, if someone says, "I can run a marathon without any training," you might respond by saying, "That's a stretch." This means that you find it hard to believe that someone could run such a long distance without any preparation.
Another example could be if someone says, "I'm going to be a millionaire by next year," you might say, "That's a stretch." This means that you think it's unlikely that they will achieve that goal within such a short time.
Overall, "that's a stretch" is a way of expressing doubt or skepticism about something that seems improbable or unlikely. It is a common slang phrase used in casual conversations.
• I am planning to finish writing this novel in a week. - That's a stretch, it takes months to finish a book.
• I will be able to run a marathon in under two hours. - That's a stretch, even professional runners struggle to achieve that.
• I am certain that I can convince the entire board to invest in my project. - That's a stretch, you need to have a solid plan and persuasive skills.
• I am going to swim across the river. - That's a stretch, you could drown!
• I can walk 10 kilometers without stopping. - That's a stretch!
• I believe I can learn Chinese fluently in three months. - That's a stretch, it takes years to become fluent in a language.