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Treatment may not be necessary if the goitre is not caused by disease and is small.

治疗可能没有必要，如果甲状腺肿并非所造成的疾病和是小。

Removal of the goitre may be necessary if it is causing difficulty with breathing or swallowing.

取消对甲状腺肿可能是必要的，如果这是造成呼吸困难或吞咽。

He said:"If it is necessary, I will speak to the Governor."

他说："如果必要，我去和主管人说。"

If you desire to join the ranks of slimming, it is necessary to taste the taste of grapefruit.

如果你渴望加入纤体的行列，就要尝尝葡萄柚的滋味了。

If you are using Red Hat, and adhere to their user and group ID creation scheme, it is only necessary to use 002 for a umask.

如果您使用的是 Red Hat，并使用其用户和组 ID 创建策略，则应当将 umask 设为 002。

Groyne is a common measure used in channel improvement. It will give rise to serious consequence if the design of groyne is improper. To go deep into study of the variation of flow feature in river due to building groyne is extremely necessary.

丁坝是航道整治中常见的工程措施之一，但若设计失当，可能带来许多严重后果，对丁坝所形成的许多水流条件变化开展深入研究是十分必要的。

Jim mcGregor, the analyst of organization In -Stat, says: Even if we take entire hafnium, necessary for 300- mm plate, it it is not possible to see with the naked eye.

，分析师的组织In - Stat的，内容为：即使我们采取整铪，有必要为300 -毫米钢板，它是不可能看到的肉眼。

If this is necessary, with the help HardCopy pro it is possible to take mouse pointer.

如果这是必要的，与帮助印刷版亲，这是有可能采取鼠标指针。

It's necessary to build the Implementing system for socialism honorable sense if the fufillment and development of a fine social practice and the creation of harmon...

我们必须建立与健全社会主义荣辱观的教育、修养、示范、评价、监督的践行机制，促进良好的社会风气的形成与发展，努力构建和谐社会。

Haw-haw, free software movement is just sex liberate movement, while sharing software and sharing sex respectively, but marriage is still necessary : If free software foundation can begin to build this GNU Marriage System, extend the marriage institution to free software system, it would be very nice, software get shared in this system.

哈哈，自由软件运动就是性解放运动，分别是共享软件和共享性，但婚姻还是有必要的：）如果自由软件基金会能开始建立这样的一个GNU Marriage System，把婚姻制度推广到自由软件系统里就好了，软件就在这个系统里得到共享。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。