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You may not know if you have a heart attack：所以意识不到自己心脏病发

You'll never be able to feel angina.|你感受不到心绞痛 | You may not know if you have a heart attack.|所以意识不到自己心脏病发 | You may not be able to get help in time.|可能得不到及时的救治

We have an urgent need for help; we are running out of water：我们急需要帮助,我们的水就快要用光了

12、acquire, attain, obtain, gain, earn, achiev... | We have an urgent need for help; we are running out of water.我们急需要帮助,我们的水就快要用光了. | 14、adjust, regulate, rectify, amend, convert, al...

don't have/need to do sth. = needn't do sth：没有必要做某事

31、 走很远 go far | 32、 没有必要做某事 don't have/need to do sth.、needn't do sth. | 33、 他们的家庭作业需要帮助 need help with their homework

Have a problem with：有......问题

114. feel cold,hungry,comfortable,sad,happy感到冷,饿,舒服,悲哀,快乐 | 116. have a problem with有......问题 | 117. help sb. with sth. 帮助某人做某事

Could it have something to do with：会不会与. . . 有关呢

1 Many people have been seized for no reason at all.许多人无缘无故被抓了. | 2 Could it have something to do with...会不会与...有关呢 | 3 I couldn't help overhearing.我不小心听到的.

have an influence on sb/sth：有影响

have access to 接近;到达(9) | have an influence on sb/sth 有影响(5) | help sb with sth 帮助某人(6)

have time on one's hands to have time available：有时间

Paul is bright but he doesn't study very hard.保罗很聪明,但... | 4. have time on one's hands to have time available 有时间 | Call me if you need help. I have lots of time on my hands.需要帮忙时就打通电话...

will have to：必须做

870. will be able to 能够 | 871. will have to 必须做 | 872. with one's help 在(某人)帮助下

have trust in：对...信任

have trouble in sth.%[]%在...有困难% | have trust in%[]%对...信任% | help index%[]%帮助索引%

haven't：(同)have not没有

Have you any paper? => 你有纸吗? | haven't => (同)have not没有 | help forward => 促进,鼓励

phenol red：酚红,苯酚磺酞

phenol reagent 酚试剂 | phenol red 酚红,苯酚磺酞 | phenol red test 酚红排泌试验

accessory equipment：附件

accessory equipment 辅助设备 | accessory equipment 附件 | accessory part 附件