重点讲解:
venture
vt. 敢于
vi. 冒险;投机
n. 企业;风险;冒险
He ventured that plants draw part of their nourishment from the air.
他试探着提出了植物从空气中吸取它们的部分养分的观点
demonstrate
vt. 证明;展示;论证
vi. 示威
They are anxious to demonstrate to the voters that they have practical policies.
他们急于向选民证明他们有切实可行的政策。
expression
n. 表现,表示,表达;表情
Language is a means for the expression of thought.
语言是一种表达思想的方式。