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NotesonthetextExperimentshaveprovedthatchildrencanbeinstructedinswimmingataveryearlyage.實(shí)驗(yàn)證明，兒童在很小的時(shí)候

Notes on the text

Experiments have proved that children can be instructed in swimming at a very early age. 實(shí)驗(yàn)證明，兒童在很小的時(shí)候就可以開(kāi)始學(xué)習(xí)游泳。
at a very early age: 在很小的時(shí)候
At a special swimming pool in Los Angeles,children become expert at holding their breath under water even before they can walk. 在洛杉磯的一個(gè)特設(shè)的游泳池里，孩子們甚至在還沒(méi)有學(xué)會(huì)走路時(shí)就已經(jīng)能熟練地在水下屏住呼吸了。
become expert at: 成為某方面專家，擅長(zhǎng)做某事
hold their breath: 屏住呼吸
Tricycles are lined up on the floor of the pool seven feet under water. The children compete against each other to reach the other end of the pool. 三輪車并排放在7英尺深的游泳池底上。孩子們比賽看誰(shuí)先到達(dá)游泳池的另一端。
line up：并排
compete against: 與......競(jìng)爭(zhēng)，比賽
Some children can cover the whole length of the pool without coming up for breath even once. 有些孩子能夠跑完游泳池的全長(zhǎng)而不用露出水面換氣。
come up for breath: 升上水面換氣
Whether they will ever become future Olympic champions,only time will tell. Meanwhile,they should encourage those among us who cannot swim five yards before they are gasping for air. 他們將來(lái)是否能成為奧林匹克的冠軍，這只能由時(shí)間來(lái)作出回答。與此同時(shí)，他們對(duì)我們中的那些游不了5碼就已喘不過(guò)氣來(lái)的人應(yīng)該是種鼓舞。

Special difficulties

He was found guilty of murder and condemned to death.
be guilty of murder：犯謀殺罪
be condemned to death: 被處死刑
I consulted my lawyer on the matter and I shall act on his advice.
consult sb. on sth.: 向某人咨詢某事
act on his advice: 聽(tīng)從他的建議
I tried to reason with him,but he was very rude to me.
reason with sb. ：和某人理論
be rude to sb.: 對(duì)某人無(wú)理
I am grateful to you for being so patient with him.
be grateful to sb: 向某人表示感謝
be patient with sb.: 對(duì)某人很有耐心
You demand too much of him;he is not really equal to the task.
demand too much of him: 對(duì)他要求太多
be equal to the task: 勝任這個(gè)任務(wù)
He\'s entitled to a pension,but he won\'t dream of retiring yet.
be entitled to a pension: 享有退休金的權(quán)利
If you fail in this attempt,don\'t count on me for help.
count on sb.: 依賴某人