trace作動詞的意思是（通過調查）找到、追溯、追蹤，沿（特定路徑）走、畫、勾畫出輪廓，作名詞的意思是痕跡、踏出來的小路、痕跡、語跡、跟蹤，微量、絲毫、描記線、交線、韁繩，它的發音就是【tre?s】。

explain的常用短語是：用作動詞(v.)explain away (v.+adv.)通過解釋消除… give a satisfactory reason for; get rid of by explanationexplain sth ⇔ awayI didn't believe her at first, but she managed to explain away my doubts.起初我不相信她,可是她的解釋消除了我的懷疑。She explained away the child's fears.她通過解釋消除了孩子的恐懼。He tried to explain away his lateness, but we didn't accept his excuse.他竭力為自己遲到辯解,但是,我們不相信他的托詞。You will find it difficult to explain away your use of such offensive language.你將會發現你很難為說過這種無理的話辯解。He thought of a reason to explain away his failure.他想出一個理由為他的失敗辯解。John explained away his unfinished task by showing his boss a certificate for sick leave.約翰交給上司一個病假條,以此解釋他為什么沒完成任務。The criminal tried to explain away the false signature, but it was clear that he was guilty.罪犯試圖為偽造簽名一事開脫自己,但他顯然是有罪的。The murder suspect couldn't explain away his fingerprints at the scene.這個殺人嫌疑犯解釋不清為什么在殺人現場會留有他的指紋。Such a conclusive evidence is hard to be explained away.如此確鑿的證據是很難巧辯的。explain的意思是v.說明；解釋。explain【近義詞】define。

explain的第三人稱單數是：explains。explain的詳盡釋義是v.(動詞)說明，解釋，闡明說明...的理由替...辯解吐露，講出，明說揭開。explain的例句是用作動詞(v.)She explained her conduct to her boss.她向老板說明了自己那種表現的原因。

explain的現在分詞是：explaining。explain的詳盡釋義是v.(動詞)說明，解釋，闡明說明...的理由替...辯解吐露，講出，明說揭開。explain的讀音是英[?k'sple?n]；美[?k'sple?n]。

explain的過去式是：explained。explain的詳盡釋義是v.(動詞)說明，解釋，闡明說明...的理由替...辯解吐露，講出，明說揭開。explain【近義詞】define。

propose的意思是：v.打算；計劃；向 ... 提議；求婚；提名。propose的詞語用法是v.(動詞)propose的基本意思是“提議,建議”,多指在討論或爭辯中提出明確的意見或建議,強調要求對方予以考慮或同意。引申可表示“打算,計劃(做某事)”?？捎米骷拔飫釉~,也可用作不及物動詞。用作及物動詞時,可接名詞、代詞、動名詞、動詞不定式或從句作賓語。后接從句時,從句要用虛擬語氣。propose的讀音是英[pr?'p??z]；美[pr?'po?z]。

nonono

nonono

1.It could make extra training and instruction affordable.(它使人們負擔得起額外的培訓和指導費用。)

1、名詞性從句，即指性質相當于名詞的從句，它包括主語從句、賓語從句、表語從句和同位語從句。從高考的考查的實際情況來看，名詞性從句考得最多的是賓語從句，其次是主語從句，再次是表語從句，而同位語從句則很少考查。2、連接詞 that 引導名詞性從句時，只起連接作用，沒有任何意思，也不充當句子成分，在賓語從句中可省略，但引導其他名詞性從句時通常不省略。如：