3.unmixed with any other substance纯粹的

purpose [5p[:p[s] n. 1.an intention or plan; reason for an action目的; 意图:

do sth on purpose故意做某事

do sth for/with the purpose of为目的做某事

2.free from evil; without sexual thoughts or experience纯洁的; 无邪的

2.a natural force that influences or causes movement吸引力

[反]push

pump [pQmp] n. a machine, usu, with a tube and a handle, for forcing liquids, air, or gas into or out of something 泵

v. to move (liquids, air, or gas) by using a pump.用泵抽

punish [5pQnIF] v. (+ for) to cause (someone) to suffer for (a misdeed, fault, or crime)惩罚; 处罚

punishment [p5QnIFm[nt] n. the act of punishing or condition of being punished惩罚

pupil [5pjU:pl] n. a person, esp. a child, who is being taught学生(指小学生)

pure [pjU[] adj. 1.clean; free from dirt, dust, bacteria, or any harmful matter纯净的; 干净的; 无有害物质的

3.to seize and draw roughly toward one, sometimes with the desire to hurt用力拉扯:

pull up (使)停下来

n. 1.force or effort used in moving or drawing something towards one 拉力; 牵引力

2.to move (someone or something )to another place by holding and drawing along, sometimes with force 拖; 拉

4.known to all or to many众人皆知的; 公开的

n.公民; 公众(集体名词, 作主语, 谓语动词用复数) :

the public公众; 公民(作主语, 谓语动词可单可复)

in public 公开地; 当众地

adv. publicly

pull [pUl] v. 1.to draw (something) along behind or after one while moving拉

3.in the sight or hearing of many people; not secret or private公开的:

2.for the use of everyone;　 not private 公用的

3.to show (oneself or itself) afterwards, in the course of time or experience, etc., to be of the quality stated证实:

prove (to be ) + n./ adj.(作表语) 被证明/证实是;

prove that-从句: 证明; 证实

provide [pr[5vaid] v. (+ for/ with) to supply (something needed or useful)提供; 供给:

provide sth. for sb.(= supply sth for sb.)为提供;

provide sb. with sth.(= supply sb. with sth.) 供应某人某物

public [5pQblIk] adj. 1.of, to, by, for, or concerning people in general 公众的:

2.to test (a quality or the quality of something) 试验