First hand imformation provides evidence and hlp us imagine the real scene.
Second hand imformation provides opinions of other people and provides reference and help us analsed investigate the issue.
以上的幾句,文法有無錯呢?
如第一行 and 後面的 help 用不用加上 s ?
而第三行的 help 用不用加上 s ?
還有其他文法錯誤嗎?急...謝