He has known both grief and happiness.（英译中)

From what has been discussed above, we may safely draw the conclusion that both of day schools and boarding schools are important to train young students for our society.（英译中)

He has very regular features.（英译中)

He has no money.（英译中)

Cashew nuts and walnuts are both nuts.（英译中)

He has a mild nature.（英译中)

Copper and gold are both metals.（英译中)