1.arrest vt.逮捕,拘捕; 止住,阻止
例句:The sufferer may have to make major changes in his or her life to arrest the disease
患者可能必须对生活习惯作出重大调整以控制病情。
2.essential adj.必要的; 本质的; 基本的; 精华的
例句:Protein is essential to life.
蛋白质是生命必不可少的。
3.demonstrator n.游行示威者; 证明者,示范者; 实物说明者
例句:I saw the police using tear gas to try and break up a crowd of demonstrators.
我看见警察正试图用催泪弹驱散一群示威者。
4.promise vt.允诺,许诺; 给人以…的指望或希望
例句:'I won't, I promise you, 'said Phyl earnestly and humbly.
“我不会,我答应你,”菲儿诚恳地、虚心地说。
5.observe vt.观察; 研究
例句:All the football match spectators were able to observe orders in the stadium.
球赛观众都能遵守会场秩序。