他用拳头击打了桌子。
tāyòng quántou jī dǎ le zhuōzǐ 。
He hit the table with his fist.
拳头是力量的象征。
quántou shì lìliàng de xiàngzhēng 。
A fist is a symbol of strength.
他握紧拳头，准备迎接挑战。
tā wò jǐn quántou ， zhǔnbèi yíngjiē tiǎozhàn 。
He clenched his fist, ready to face the challenge.