tàn xiǎn duì / yán zhe / yōu àn / de / dì xià / tōng dào / huǎn màn / qián jìn / shuí yě / bù gǎn / dà shēng / shuō huà

探险队沿着幽暗的地下通道缓慢前进，谁也不敢大声说话。

The exploration team moved slowly along the gloomy underground passage, and no one dared to speak loudly.