循环节

xúnhuánjié

recurring chapter of a rational decimal

循环赛

xúnhuánsài

round-robin tournament

循环性

xúnhuánxìng

recurrent

循环系统

xúnhuánxìtǒng

circulatory system

循环论证

xúnhuánlùnzhèng

circular argument

郎肯循环

lángkěnxúnhuán

Rankine cycle (engineering)

循环使用

xúnhuánshǐyòng

recycle

循环小数

xúnhuánxiǎoshù

recurring decimal

血液循环

xuèyèxúnhuán

blood circulation

冠脉循环

guānmàixúnhuán

coronary circulation

恶性循环

èxìngxúnhuán

vicious circle

燃料循环

ránliàoxúnhuán

fuel cycle

良性循环

liángxìngxúnhuán

virtuous cycle (i.e. positive feedback loop)

柠檬酸循环

níngméngsuānxúnhuán

citric acid cycle

密闭式循环再呼吸水肺系统

mìbìshìxúnhuánzàihūxīshuǐfèixìtǒng

closed-circuit rebreather scuba (diving)