Definition: calm and quiet Level: C1
花园很宁静。
The garden is ___tranquil.
不幸的是，这个宁静的天堂却因不受控制的旅游业而逐年被毁。
Unfortunately, though, this ___tranquil paradise has been destroyed year by year, by the uncontrolled tourism.
她发现早晨的湖泊非常宁静。
She found the lake to be very ___tranquil in the morning.
