When we talk about past events which have no present importance, we do not use the present perfect.
谈论过去的事件其对现在不重要，不用现在完成时。
There is no present evidence that domestic cats play a role in the transmission cycle of H5N1 viruses.
目前没有证据表明，家猫在H5N1病毒的传播链中发挥了作用。
Each Investor understands that such information is not now available and the Company has no present plans to make such information available.
每一位投资者都明白，目前无法获取这样的信息而且，该公司也没有让公众获取这类信息的计划。
In regard to some special adjusting method of body temperature, such as perspiration, there is no present model could describe the behavior of perspiration in mechanism.
对于人体一些特殊的体温调节方式，如发汗等，现存的模型都无法从机理上对其进行合理的描述。
At present, no widely approved vaccine exists for malaria.
目前没有被广泛认可的疟疾疫苗。
At present there is no way to predict or avoid such enormous avalanches, but, luckily, they are very rare.
目前还没有办法预测或避免如此巨大的雪崩，但幸运的是，它们非常罕见。
We will leave them to smoke and chatter and brag, since we have no further use for them at present.
我们让他们抽烟、聊天和吹牛，因为我们目前暂时没有事情麻烦他们。
The present Catherine has no other likeness to her, except a breadth of the forehead and a certain arch of the nostril that makes her appear rather haughty.
现在的凯瑟琳没有别的地方像她，除了宽额和有点拱起的鼻孔，这使她显得简直有点高傲。
No matter how formal or informal the work environment, the way you present yourself has an impact.
无论工作环境多么正式或非正式，你表现自己的方式都会产生影响。
If people disregard the great works of the past, it is because these works no longer answer the needs of the present.
如果人们忽视了过去的伟大成就，是因为这些成就不再满足现今的需要了。
When foods present no worry to the average, people begin to focus more on interests on handsome appearance and happy leisure time.
当人们不再担心食物时，他们开始把更多的兴趣集中到漂亮的外貌和快乐的休闲时间。
What troubled the teacher was that no one present made an answer when asked who had broken the window, so he didn't know who was to blame.
令老师烦恼的是，问起谁打破了窗户时，在场的人没有一个回答，所以他不知道该责怪谁。
The point is that on the basis of present knowledge there is no reason to view male care as a restricted or specialized phenomenon.
关键是，根据现有知识，没有理由将男性护理视为一种受限或专门现象。
No air bubbles were present in the green ice, suggesting that the ice was not formed from the compression of snow but instead from the freezing of seawater.
绿色冰层中不含气泡，这表明了这种冰层是由冻结的海水形成的，而不是凝结压紧的积雪。
"From that day," continued Mr. Prentice, "there was no boy in the school who learned more rapidly than Henry. From that day till the present hour he has been a student; and he now urges his son George to 'try again' as he tried."
“从那天起，”普伦蒂塞先生继续说，“学校里没有一个男孩比亨利学得更快。从那天起，直到现在，他还在学；现在他敦促他的儿子乔治像他那样‘再试一次’。”
You shouldn't worry about the present either. There is no river that can't be crossed.
你对目前的申请别犯愁，没有过不去的河嘛。
There was no microbody in the generative cell but many microbodies were present in the tube cell cytoplasm.
生殖细胞内不具微体，而管细胞的细胞质有较多的微体。
With no grandparents' present, the prince may feel less inhibited when it comes to tales about his older brother.
由于祖父母没有出席，当王子谈到关于兄长的故事时可能就没有那么拘束了。
Anyway, let's start at some of the less severe (though still unsettling) things that can happen when the coolant liquid is no longer present in the core.
总之，如果堆芯中的冷却剂已经不复存在，那么让我们先从一些不太严重(也仍然没有得到解决)的可能情况开始谈起。
Now what are the odds that no one present at that bench at that time has a birthday match?
那么，现在长椅上的人生日各不相同的概率是多少？
If no namespace is present, it assumes DS 1.0 compatibility.
如果文件中没有出现命名空间，就认为其兼容DS 1.0。
The mystics say that from the point of view of the Eternal, there is no past, present, and future, and that everything coexists simultaneously.
神秘主义者们说，从“永恒”的观点来看，没有“过去”、没有“现在”、也没有“未来”，一切都是同时存在的。
Like most children, Dougie lived completely in the present, no thought of the future or the past.
像大多数孩子一样，沃克尔完全活在当下，不会考虑过去或未来的事情。
Looking at new employment Numbers, there may be no time like the present.
查看最新的就业数据，估计没有比现在更好的时候了。
This processing happens in a loop until no more elements are present in the endpoint database.
在一个循环中进行这个处理，直到端点数据库中没有元素为止。
There is, at present, no effective institutional representation of either workers or employers.
当前，工人和雇主都没有有效的公共机构代表。
There is, at present, no effective institutional representation of either workers or employers.
当前，工人和雇主都没有有效的公共机构代表。
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