adj.第一手的,直接的;
例句:
We wished to obtain information at first hand.
我们希望能得到第一手情报.
To his new job he brought knowledge at first hand.
他将第一手的知识用于他的新工作.
Students learn through a mixture of first-hand observation hands-on experience systematic instruction and personal reflection.
学生通过事先观察、动手体验、课程教育和个人反思综合途径进行学习.