positive的同義詞有optimistic，confident，hopeful；positive的反義詞是negative。positive指積極的、良好的或有所助益的。例句：We must take positive steps to deal with the problem.

This contract is advantageous to the owners.

這份合同對(duì)業(yè)主有利。

You'd better be more cautious, as your rival is in an advantageous position.

你的對(duì)手現(xiàn)在處于有利地位，所以你最好更謹(jǐn)慎一些。

Overseas investment has had a positive effect on exports.

海外投資對(duì)出口有積極影響。

The agreement should have very positive results in the long term

從長(zhǎng)遠(yuǎn)來(lái)看，這個(gè)協(xié)議將會(huì)產(chǎn)生非常積極的影響。

His family have been a very positive influence on him.

他的家庭對(duì)他有十分良好的影響。

She tried to be more positive about her new job.

她力求對(duì)新工作更有信心。