A watermelon is red inside and green outside.

　　西瓜內(nèi)紅外綠。

　　Oh, what a big watermelon!

　　喔唷，這么大的西瓜！

　　The watermelon has gotten bad.

　　西瓜婁了。

　　The pulp of this watermelon is too spongy.

　　這西瓜瓤兒太肉了。

　　The prospects of this year's watermelon market are good.

　　今年的西瓜市場(chǎng)看好。