他微笑着，她也微笑着 -他们马上便明白了，的英文

he smiled, she smiled - they knew right away

• 他:    he
• 微笑:    smile
• 着:    wear; dress
• 她:    she
• 也:    also; too; as well ...
• 他们:    they
• 马上:    at once; immediate ...
• 便:    quiet and comforta ...
• 明白:    clear; obvious; pl ...
• 了:    finish; complete; ...