例句：
Their friendship soon deepened into love.
他們的友誼很快發(fā)展成為愛情。
Your friendship means a great deal to me.
你的友誼對我來說是很珍貴的。
By degrees their friendship grew into love.
他們的友誼逐漸發(fā)展成為愛情。
A bond of friendship had been forged between them.
他們之間形成了一種友誼的紐帶。