4 ) use of ev , the limite time and cost can be controlled exactly . overcome the past weakness depending on the experience 4 )通过ev的应用，对工程项目的工期、成本进行精确的量化控制，克服了以往工程中对工期、成本凭经验、靠估计的粗放管理的不足。
By this way the plans will be made quickly , rationally , scientifically . now the planners only make one scheme , and they only take the technical targets into account , too 由于目前计划员在编制作业计划时，仅凭经验对技术指标进行评价，编制出一个作业方案。
At present , we mainly depend on our experience during designing special subgrade in the areas because of lacking in sufficient scientific support and specific confirmed methods 目前，由于缺乏充分的科学依据和具体的确定方法，在设计黄土地区路堑高边坡时主要是凭经验。
A useful rule - of - thumb here is the eighty - twenty rule which says 80 % of the products sold in a given category will be consumed by 20 % of the customers 这里有一个有用的单凭经验的方法，那就是八十对二十的法则，即在一个特定类别中被销售产品的80 %将会被消费者中的20 %所消费。
Sheer experience had already taught her that , in some circumstances , there was one thing better than to lead a good life , and that was to be saved from leading any life whatever 她全凭经验已经懂得，在某些情形里，有一个比过诚实的生活更好的办法，那就是无论什么生活也不过。
After the problem is reported , engineering staffs will analyze in order to reproduce and isolate faults , narrow down to the root cause , and fix the problem 故障出现后，各分公司工程部技术人员凭经验及对故障表现的分析，初步判断故障所在，并进行处理。做到及时发现故障，积极查找故障原因，认真处理排除故障。
Many struggles and much pain can clear the way , but i am certain that only unceasing prayer can let me enter it . - - - - - - - - - - the return of the prodigal son 种种被视为重大的挣扎和痛苦并非终结，它们的作用是清理路径上的障碍，让我们透过不住的祈祷以进入上帝的心意中。祈祷充足地调校我们凭经验对未来的设想，因而信服上帝。
For example , in the english locale , words such as " a , " and , " is , " and " the " are in the english noise word file and are left out of the full - text index since they are empirically known to be useless to a search 例如，在“英语”区域设置中，诸如“ a ” 、 “ and ” 、 “ is ”和“ the ”之类的词就会列在英语干扰词文件中，并且凭经验知道它们对搜索没有用处，因此将它们排除在全文索引外。
Despite the new high - tech processes , human input is still essential . a facial recognition system , for example , has the potential of narrowing human searches but staff experience is still crucial in making the final identification 就以容貌辨认系统为例，系统可有效地根据所输入的容貌特徵进行搜寻，然后提供与特徵相符的人的资料，但要确定当中谁是目标人物，最终还是要部门人员凭经验来判断。
Some computing programs in the designing process are run under ideal presumptions , which more often than not tend to ignore the existence of gas flow , especially in a high - pressure , high - temperature and high - speed pulsation scenario 通常消声器设计主要凭经验，一些设计计算程序是在一些理想假设条件下进行的，而在这些假设中实际影响最大的是忽略气流的存在，而且是高压、高温、高速脉动气流的存在。
