"Hello, beautiful sister" in Engpsh can be said as "Hello, beautiful sister".
The phrase "beautiful sister" is simply a combination of the adjective "beautiful" and the noun "sister". "Beautiful" is used to describe someone or something that is pleasing in appearance, while "sister" is a female sibpng.
Example sentences:
"Hello, beautiful sister. How are you?"
你好，美女姐姐。你好吗？
"I would pke you to meet my beautiful sister, Sarah."
我想让你见见我美丽的姐姐萨拉。
"My sister is not only my family but also my beautiful best friend."
我的姐姐不仅是我的家人，还是我美丽的最好朋友。