hazardous 有危險的；冒險的 The journey to the palace was hazardous. 去往宮殿的旅程是危險的。 heighten 提高；加強 If you want to succeed, you must heighten yourconfidence. 如果你想成功，你必須更加自信。 hoist 升起；吊起 Do you believe that an adult elephant can hoist the weight of a ton? 你相信一頭成年象能提起一噸的重量嗎？ hospitality 好客；殷勤 People tend to refer to hospitality industry as "window" industry just as they call tourism "smokeless" industry. 人們傾向于引用酒店業(yè)作為“窗口”產業(yè)，他們稱旅游為“無煙”行業(yè)。 humane 仁慈的，人道的 She works for humane treatment of prisoners. 她為人性化對待罪犯這個團體做事。 hurl 猛投；猛擲 He hurled curses at the man who had hurled a stone at his window. 他狠狠的咒罵那個向他的窗戶扔石頭的男人。 hypothesis 假設 The researcher made three hypotheses before his experiment, but only proved one. 研究者在他的實驗里做了三個假設，但只證明一個。 ignite 點火；燃燒 He approached the explosive to ignite it. 他走近炸藥點燃它。 illiterate 文盲的 About half the population in the country is still illiterate. 這個國家超過一半的人口還是文盲。