There are a lot of causes for heartburn and sometimes it may take a while to puzzle out what they are.

有很多原因，灼热，有时可能需要一段时间才能谜了他们的。

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There are a lot of causes that lead to pulp exposure , but the most common reasons are dental caries and mechanical injury.

引起牙髓暴露的原因较多，但最常见的病因是龋病因素和机械性损伤。 如果是制备洞形过程中的意外穿髓，人们往往选择盖髓治疗。

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This kind of tort has a lot of causes, but the most of them come from doctors, patients and their relatives, hospital management, public opinion and some deeper social causes.

侵犯医生权利有许多原因，主要来自于医生、患者及其家属，还有医院管理、社会舆论导向及其深层次的社会原因。

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After all,using cars to move goods causes a lot of carbon air pollution and traffic jams."

VOA: standard.2010.01.04

We have had a lot of theories about what causes leukaemia, but this study takes us to a very firm conclusion.

BBC: NEWS | Health | Day care prevents child cancers

All of that ambiguity causes litigants to spend a lot of time and money fighting each other.

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The bottom line: These days, a lot of social enterprises give a portion of profits to causes.

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