Cách sử dụng
The expression "on the safe side" means that you want to be very careful and make sure nothing goes wrong. You use it when you want to take extra precautions to make sure you don't have any problems. For example, if you're planning to go to a new place, you might bring extra money with you just to be on the safe side in case something happens and you need it. Or if you're unsure if it's going to rain, you might bring an umbrella with you just to be on the safe side. Basically, when you use this expression, you're saying that you want to be prepared for any possible situation.