first-hand的中文翻譯是什麼意思

To his new job he brought knowledge at first hand.

他將第一手的知識用於他的新工作.

Students learn through a mixture of first - hand observation hands - on experience systematic instruction and personal reflection.

學生透過事先觀察、動手體驗、課程教育和個人反思綜合途徑進行學習.

I know at first hand the problems that could arise the situation is mismanaged.

我切身瞭解情況處置失當會引發的種種問題.

Shadow professionals in fields of primary interest to observe work first hand.

親自去自己感興趣的實習領域觀察工作.

I found out my grades on the internet at first hand.

我從網路上直接得知我的成績.