1.The first was the primary cause, and in its absence a truce with the enemy would have been difficult.
而第一个原因是主要的原因，没有这一条，同他们讲和是不容易的。
2.As is often the case, humans are the primary cause of extinction.
通常情况下，人类是物种灭绝的主要原因。
3.Shrimp farms have been a primary cause of mangrove loss, as well as urbanization and agriculture.
海虾养殖和城市化、农业，是造成红树林消失的主要原因。
4."The risk of infection represents the primary cause of failure of alternative solutions attempted to date worldwide, " said the hospital.
院方说，“感染的风险是全球最新替代方案尝试失败的主要原因”。
5.It was not a primary cause but a second-round amplifier, which added seriously to the problem.
投机活动不是一个主要原因，但它是第二轮放大器，加重了问题的严重程度。
6.Arterial stiffening places an extra load on the heart, and is a primary cause of hypertension.
动脉壁的硬化会增加心脏负荷，是导致高血压的基本原因。
7.Their investment grade ratings of many subprime mortgage-backed securities were a primary cause of the current financial crisis.
它们给予许多次级抵押贷款支持证券的“投资级”评级，是当前这场金融危机的主要诱因。
8.Getting older is only part of the problem. Inner-ear disturbances are the primary cause.
其实，年龄的增长只是产生头晕问题的一个方面，内耳障碍才是主要原因。
9.Intelligence officials briefing the cabinet suggested that violent unrest in Syria was a primary cause for a shift by Hamas.
情报人员在向内阁做汇报的时候提到，叙利亚发生的剧烈骚乱是哈马斯转变的主要原因。
10.The square windows on the original Comet jetliner were found to be the primary cause of its disintegration.
原彗星喷气式航空班机的方形窗被发现是其碎裂的主要原因。