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All conditional statements use the truth or falsehood of a conditional expression to determine the execution path.

所有条件语句都利用条件表达式的真或假来决定执行流程。

Conversely, execution of the conditional load instruction is stalled in response to a determination that the load/store operation reservation on the first cacheable memory location has not been reset.

相反地，响应于没有在第一可高速缓冲存储区域上复位加载/存储操作预留的判定，停止执行条件加载指令。

Based on a lot of experiment results, a conclusion is drawn: comparing with other factors, the performance of branch handling strategy is the key limits of processor to exploit the instruction level parallelism existed in nonscientific code, cache miss have severe effect on superscalar processor's performance when it runs scientific code. Second, in order to reduce the branch penalty and improve the performance of superscalar processor, a new branch handling strategy—a classification based hierarchical branch handling strategy, CHBHS is proposed. It first expands the traditional processor architecture to support multiple condition code, conditional execution and Mbranch instruction, as a result, compiler can reduce the number of static conditional branch when the code is generated. Then, CHBHS tries to use the best suitable mechanism to deal with different branch base on their different behavior. CHBHS can predict the target address of unconditional branch, subroutine call and conditional branch by buffering their target address in branch target buffer, a newly proposed high efficient return address stack is used to reduce the penalty of subroutine return instruction, a new Counter Register Stack is also proposed to reduce the penalty of loop-closing branch to zero, and dynamic branch predictor is incorporate with branch target buffer to predict the outcome of conditional branch.

基于上述结论，为了尽量消除转移指令对处理器开发指令级并行性能力的影响，进一步提高处理器性能，在详尽分析目前已存在的转移处理策略的特点与局限性的基础上，首次提出了一种新的转移处理策略即基于分类的层次转移处理策略CHBHS(Classification Based Hierarchical Branch Handling Strategy)，它首先通过扩展传统的体系结构，支持多条件码、条件式执行及多分支转移技术，以使编译程序在进行代码生成时可尽量少生成条件转移指令，从而减少静态条件转移指令的数目；其次，基于不同的转移指令的行为不同这一事实，提出了对不同的转移指令采用不同的机制进行处理的思想，即对无条件转移指令和函数调用指令以及条件转移指令的目标地址，采用转移目标缓冲器来预测，对于函数返回指令，采用所提出一种的高效返回地址栈来预测其目标地址，对于大多数循环控制转移指令，采用所提出的Counter Register Stack来将其所可能带来的损失减少为0，对于其他的条件转移指令采用动态预测机制来预测其方向。

Like most languages, C++ provides an if statement that supports conditional execution.

像大多数语言一样，C++提供支持条件执行的 if 语句。

A conditional execution statement that starts by evaluating the expression that follows the switch keyword.

从计算关键字 switch 后面的表达式开始执行的条件分支语句。

A multi-branch conditional statement that allows for selective execution of bounded groups of program statements depending upon the value of a control expression.

能根据控制表达式的值对有限个程序语句进行选择性执行的一种多分支条件语句。

Because that DBC++ retrieves objects mainly by navigation and methods may be executed during query, the cost of conditional sub-expression of query statement can be used to optimize the execution of query statement.

由于DBC++主要是通过导航搜索数据库中的对象，而且在询问语句中可以执行对象的方法，因而，可以将询问中的条件子表达式的"代价"作为询问优化的依据。

On the base of this model, we give the method based on execution graph that is used to analyze the confluence and the condition that guarantees that the set of rules is confluent.

在此模型的基础上，提出了基于执行图的汇流性分析方法，给出了路径汇流和边汇流的定理，并提出了保证规则集汇流的条件。

As the superlative constitutor of industry principles and the leader in our country's TV medium industry, China Central Television is very strict with examination and approval in the execution and broadcasting of its programs.

央视作为我国电视媒体行业的最高级别行业规范的制定者、领跑者，其节目的制作、播出有着很严格的审批、运作程序，同时在全国产生着十分重要的社会影响。90年代中随着我国新闻调查类节目的发展和兴盛，央视涌现出了一批视角敏锐、选题精细、资料翔实、分析深刻、观点鲜明的栏目。

As the superlative constitutor of industry principles and the leader in our country's TV medium industry, China Central Television is very strict with examination and approval in the execution and broadcasting of its programs. It also enjoys a very significant social influence all over the nation. In the 1990s, along with the development and thriving of investigative news program, several columns emerged in CCTV, which are acute in visual angle, elaborate in subject, full and accurate in data, profound in analysis, and distinct in viewpoint.

央视作为我国电视媒体行业的最高级别行业规范的制定者、领跑者，其节目的制作、播出有着很严格的审批、运作程序，同时在全国产生着十分重要的社会影响。90年代中随着我国新闻调查类节目的发展和兴盛，央视涌现出了一批视角敏锐、选题精细、资料翔实、分析深刻、观点鲜明的栏目。

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。