1、call

　　Verb. ① cry, shout, speak loudly: 大声说，大声喊、叫; ～out
　　② name, describe, or regard as: 称为，把…叫做，把…说成; eg. He called my name. We have decided we will call the baby Mary.
　　③ emit characteristic sound: (鸟、兽)鸣、啼;
　　④ communicate with by radio or telephone: 打电话给，用电话传递; eg. I called her on the telephone.
　　⑤ summon: 呼唤，召唤，传唤;
　　⑥ make brief visit: 短暂访问，拜访; eg. We call on them at their home.
　　⑦ order to take place: 下令举行，宣布召开;

　　Noun. ① shout: 喊，叫喊; eg. We heard a call at that night.
　　② birds cry: 鸟鸣;
　　③ brief visit: 短暂访问; 
　　④ telephone conversation: (一次)通话/电话; eg. I have been expecting your call.

　　Correlative Phrases:
　　① call for: request, 要求，迎接，取; eg. Sucess in school calls for much hard study.
　　② call in: Ⅰ. withdraw from circulation 收回; Ⅱ. seek advice or services of 召来，召请;
　　③ call off：decide against doing, having, etc. 放弃，取消; eg. He called off the trip.
　　④ call on/upon：Ⅰ. visit，访问; Ⅱ. ask to do, 要某人做…，号召; eg. We called on him to finish the work.
　　⑤ call up: Ⅰ. telephone, 打电话给; eg. Call her up tonight, please. Ⅱ. order one to come come for military duty, 征调; eg. During the emergency, I was called up by the army.

　　P.S: 到目前为止，call 在CET-4考试中的出现频率为8次。

　　2、effect

　　Noun. ① result, consequence: 结果，后果; eg. The effects of the storm could be seen in the morning.
　　② efficacy：功效，效力，效果; eg. The medicine had an immediate effect.
　　③ impression, physical phenomenon: 印象，影响，效应; eg. Special lighting gave the effect of moonlight.
　　④ (～s) possession: 财物，财产。 

　　Verb.  bring about：生效，实施，招致。

　　Correlative Phrases:
　　take effect: become active/begin to perate, 引起，使生效，实施。eg. The new regulation will take effect at once.

　　Remark: Usage 用法
　　As a verb., effect should not be confused with affect: effect作动词时不能与affect混淆。
　　eg. He effected an entrance means 'He got in (somehow)', but This won't affect me means 'My life won't be changed by this': He effected an entrance意为“他(想了办法)还是进去了”；而This won't affect me则意为“我的生活不会因此而改变。”

　　P.S: 到目前为止，effect 在CET-4考试中出现的频率为6次。