The self-driving(无人驾驶 wú rén jiàshǐ) bus crosses the Zhangjiajie Grand Canyon's glass-bottomed bridge(玻璃桥 bōlí qiáo) in central China's Hunan Province on Wednesday, April 24, 2019.
The 25-seater bus weighs 5.5 ton(吨 dūn), has a maximum speed(速度 sùdù) of 40 kilometers per hour.
重点词汇 Key Word:
挑战 Challenge (to a contest); dare
Tiǎozhàn yǔ jīyù bìngcún.
挑战与机遇并存。
There exist challenges as well as opportunities.
Tā dàizhe tiǎozhàn de mùguāng kànzhe wǒ.
她带着挑战的目光看着我。
She looked at me with challenge.
