Miàn / duì / mò / shēng / de / huán / jìng / tā / suī / rán / bǎo / chí / zhèn / dìng / nèi / xīn / què / chōng / mǎn / yí / jù

面对陌生的环境，他虽然保持镇定，内心却充满疑惧。

Although he remained calm in the unfamiliar surroundings, he was filled with apprehension inside.