Those people look as though they don't have any problems.
Judging by their outward appearance, you might think their lives are problem free.
ーThose people look as though they don't have any problems.
「彼らは何も問題がないかのように見える」
look as though they don't have any problems で「何も問題を抱えていないかのように見える」
ーJudging by their outward appearance, you might think their lives are problem free.
「外見から判断すると、彼らの人生は問題がないように思うかもしれない」
judging by ... で「〜から判断すると」
outward appearance で「外見」
problem free で「問題がない」
ご参考まで！
カナダ 
