Mosso: moved, moving; used with a preceding più or meno for faster or slower respectively.
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Zhou Yongliang was in the car with Yuan Dongping.
He made a quick but careful decision tonight. It was quick because he finally made up his mind when he was talking with his uncle earlier. Probably it just took a few days for him before he said "yes" to his uncle.
But, it was also a careful decision because he had contemplated the plus and minus before accepting his uncle's offer. His uncle's sincere expression and attitude affected his decision as well. That was why he agreed to follow his uncle to move to Haidian tonight.
His uncle drove a car to Tongzhou today, so they went back to Haidian by car.
"How is your school, Ah-Liang? Do you feel any difficulty with your lesson?" Yuan Dongping asked while driving the car carefully.
He had been driving for quite a long time, and he said that they were already close to their destination.