“沉思地”的英语可以翻译为：musingly，pensively ...

他沉思地看着那张照片.He looked at the picture thoughtfully.她回过身来,沉思地望了望他.She turned round and regarded him thoughtfully.车上约有一半的乘客沉思地望着我.About half the passengers on the bus werelooking at me thoughtfully....