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1.The oscillation mechanism of self-heating SnO2 sintered sensor in CO gas and air is discussed and the thermal equation of the sensor resistance is given. We have obtained the approximate expression of oscillation period for sensor resistance and the necessary condition of the cause of oscillation. We have also gotten the relationship between the frequency F,the CO concentration N and the working voltage V.
SnO2气敏电阻在含CO空气中的振荡机理，给出了气敏电阻在含CO空气中的热学方程式，获得了振荡周期τ的近似表达式，气敏电阻起振的必要条件及振荡周期τ与CO气体浓度N、工作电压V的关系。收藏指正
2.We must go round knocking on doors if necessary to drum up more support for the cause.
若有必要，我们一定前去敲众人的家门，为这事业争取更多的支持。收藏指正
3.Infighting terrorism, it is necessary to address both its symptoms and root cause, and adopt comprehensive measures, especially in solving the question of development, narrowing the North-South gap, and ending regional conflicts.
反对恐怖主义要标本兼治，采取综合措施，其中解决发展问题、缩小南北差距、解决地区冲突十分重要。收藏指正
4.Additional diagnostic tests may be necessary to distinguish FIC from other diseases that cause lower urinary tract symptoms in cats such as bacterial urinary tract infection (rare in young to middle-aged cats), stones (also called calculi or uroliths), and tumors (rare in cats).
为了辨别FIC和其他下泌尿道疾病，如细菌性下泌尿道感染（鲜少发生在年轻到中年的猫）、结石（也叫做结石或尿石），和肿瘤（少发生于猫），附加的诊断性检验也许是必须的。收藏指正
5.They found that it was necessary to give at least 1600 IU per day to cause a significant reduction in oxidative stress -- twice that used in some of the previous clinical trials.
在具有类似心血管危险因素的另一个实验组中，研究者在16周的时间里，通过给不同的剂量（0，100，200，400，800，1600，3200IU每天）来找出最低有效剂量。收藏指正
6.To hypertension precaution should take integrated step, begin the conduct propaganda that is an object with numerous people to teach, perfect and necessary organization protects a system, because the hair cause of disease that makes masses understands high blood pressure is worth limits normally with blood pressure, carry appropriate weight, notice physical training, adjust A behavior and mental insecurity position, abstemious smoke wine, eat fresh and vegetable fruit more, of the natrium in controlling food and cholesterol absorb.
对高血压预防应采取综合措施，开展以广大人民群众为对象的宣传教育，健全必要的组织保护体系，使群众了解高血压的发病原因和血压正常值范围，保持适当体重，注重体育锻炼，调整A型行为和精神紧张状态，节制烟酒，多吃新鲜蔬菜水果，控制饮食中钠与胆固醇的摄入。收藏指正
7.A genetic disorder in which the body lacks the enzyme necessary to metabolize phenylalanine to tyrosine. Left untreated, the disorder can cause brain damage and progressive mental retardation as a result of the accumulation of phenylalanine and its breakdown products.
苯丙酮尿一种先天性代谢异常，其机体缺乏将苯丙氨酸代谢成酪氨酸所必需的酶。如果不治疗，这种异常会导致脑损伤和精神抑制，这是苯基丙氨酸沉积和其分解物的产物收藏指正
8.Therefore the research on the cause of BSR and blanking zone is very necessary in gas hydrate research.
因此在天然气水合物研究中，对似海底反射以及空白带形成机理进行研究是非常必要的。收藏指正
9.In the tide of revitalizing the country with science and technology, it is necessary to probe into the quality for the teachers of physical training with predicative insight, so that we can promote the cause of physical training.
摘要在科技兴国的大潮中，我们有必要用超前的眼光，对我国体育教师应具备的素质进行一些更为深入的探讨，以促进我国体育教育事业的发展。收藏指正
10.Therefore, it is necessary to monitor intraoperational spinal cord function in order to observe spinal cord status in any time, to find the position and cause of spinal cord injure immediately and early, to adopt methods to prevent unreversible neurological function damage.
因此，十分有必要在术中实施脊髓功能监护，以便随时了解脊髓功能状态，及早、迅速地发现损伤并确定损伤部位及其诱因，及时给出纠正措施，防止不可逆神经功能损伤的发生。收藏指正
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