rè xiàn
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我拨打了热线电话，但一直没人接听。
wǒ bōdǎle rèxiàn diànhuà, dàn yīzhí méirén jiētīng.
I called the hotline, but no one answered.
这个热线电话是24小时服务的。
zhège rèxiàn diànhuà shì èrshísì xiǎoshí fúwù de.
This hotline is available 24 hours a day.
如果你有任何问题，请拨打我们的热线电话。
rúguǒ nǐ yǒu rènhé wèntí, qǐng bōdǎ wǒmen de rèxiàn diànhuà.
If you have any questions, please call our hotline.
热线电话 (rèxiàn diànhuà)
hotline
服务热线 (fúwù rèxiàn)
service hotline
冷线 (lěng xiàn)
cold line
死线 (sǐ xiàn)
deadline
The Chinese word 热线 (rèxiàn) is composed of two characters: 热 (rè), meaning "hot", and 线 (xiàn), meaning "line". The term "hotline" was first used in the context of international relations during the Cold War, referring to a direct communication channel between the leaders of the United States and the Soviet Union to prevent misunderstandings and reduce the risk of nuclear war. In Chinese, the term 热线 was adopted to refer to this concept, and its usage has since expanded to include other types of direct communication channels, such as customer service hotlines and emergency hotlines. The term 热线 is also used in a more general sense to refer to anything that is popular or in high demand, such as a "hot topic" or a "hot seller".
