Kotloff says that influenza is a wily virus, one that is difficult to predict.
Kotloff说，流感病毒是狡猾的，很难预知。
Thus, the influence of technology on Earth's carrying capacity is difficult to predict and discern.
然而技术对地球承载能力的影响很难预测和被察觉。
However, he cautioned that it was very difficult to predict how large the ultimate decline would be.
但他警告称，很难预测最终跌幅会有多大。
That's what makes it so difficult to predict exactly how rapidly we might see the Arctic go ice-free.
这就是为什么我们很难准确预测最早什么时候能看到无冰的北极。
It is difficult to predict the results of grinding due to random distribution and shape of grain.
由于磨粒形状和分布的随机性，使得预测磨削加工的结果难以实现。
THE moment when a throng of peacefully moving people turns into a panicked herd is difficult to predict.
何时一群静静行走的人们突然变为受惊的群体，这是很难预测的。
Analysts complain that the scheme has so many uncertainties that it is difficult to predict any outcome.
分析师抱怨说这项计划有太多不确定因素，因此很难预测出任何结果。
This means that their internal operations can be hard to understand and their behaviour difficult to predict.
这意味着它们的内在经营很难理解并且很难预料它们的行为。
That makes it difficult to predict how a change in the organ's structure will alter the way it functions.
这致使科学家很难预测器官结构的变化是如何改变其功能。
15% of pregnancies and childbirths need emergency obstetric care because of risks that are difficult to predict.
由于难以预测的风险，15%的妊娠和分娩需要紧急产科保健。
About 12 percent of Earth's land surface is now used for crops. Some of the consequences are difficult to predict.
地球表面陆地大约12%已经被开发种植农作物，其后果还是很难预测的。
Customers are less loyal, and global competition more fierce, making it difficult to predict where sales are going.
忠诚的客户越来越少，全球竞争日益激烈，这些因素让销售额更加难以预测。
As the Court says in Pennsylvania Coal, this is a matter of degree and therefore difficult to predict in advance.
正如最高法院在宾州煤炭案中所说的那样，有一个程度的问题，所以很难事先判断。
When the nature of the data to be captured is unclear or difficult to predict, such flexibility can be an absolute necessity.
如果数据的本质是不清楚的，或者是难以预测的，那么这样的灵活性是绝对必要的。
Consequently, data about them are abundant, and their behavior is relatively well understood, although still difficult to predict.
因此，关于他们的数据很多，他们的行为相对较易被了解，虽然仍旧很难预测。
Currencies are notoriously volatile and difficult to predict. Even investment Banks with their armies of analysts frequently call it wrong.
货币的不稳定性和难预测性是众所周知的，就连投资银行和它们的分析师军团，也常常会出现误判的哦。
"We really want to keep both players here," he told Voetbal International. "I cannot say if that is possible, it is difficult to predict."
“我们真的非常想要留下这两名球员，”他向《国际足球》杂志说，“我可说不准这种可能性，太难预测了。”
It's difficult to predict the exact shade the moon will take, which will depend on how much dust and clouds are in the atmosphere during the eclipse.
很难预测那时月面呈现的确切的色彩，因为这是由发生月食时大气中的粉尘和云朵决定的。
It is difficult to predict the knowledge you need in order to fully understand the customer's business environment, because every business is unique.
难以预测您需要哪些知识来用以完全理解客户业务环境，因为每个业务都是惟一的。
Pulmonary arterial hypertension (PAH) can complicate several types of congenital heart disease, and its reversibility is often difficult to predict.
很多类型的先天性心脏病由于发生肺动脉高压而变得更加复杂，并且肺高压的可逆性常难以预测。
Background - Congenital heart disease can be complicated by pulmonary arterial hypertension (PAH), the reversibility of which is often difficult to predict.
背景-——先心病由于肺动脉高压而变得更加复杂，肺动脉高压的可逆性常难以预测。
OPEC has historically had a difficult time enforcing its agreements, however. It is difficult to predict how the cartel's latest move will affect prices this year.
然而欧佩克历来难以执行其协议。很难预测该卡特尔最近的举措将会如何影响今年的石油价格。
Looking beyond today's immediate needs, there are several proposals for high speed networking but it is difficult to predict which will become a true industry standard.
抛开目前的直接需求来看看未来，对高速网络已有几个提案，但目前尚难预测哪一个提案会成为真正的工业标准。
In production process, many complex factors which influence cost affect each other and the coupling phenomenon exists, so it is important and difficult to predict the cost.
在生产过程中，影响产品成本的因素多而复杂，因素之间相互影响，存在耦合现象，因此准确预测成本是一个重要又难以解决的问题。
It's difficult to predict consumer demand for EVs, especially since there are other forms of green cars out there for consumers, such as hybrid cars and plug-in electric vehicles.
预测客户对电动汽车的需求颇有难度，尤其是考虑到市面上已有其他类型的环保汽车，比如混合动力车和插电式电动车。
Even veteran programmers will admit that when it comes to SaaS applications, sometimes performance bottlenecks are difficult to predict because of the number of variables involved.
即使是老练的程序员也承认，在SaaS应用程序中，有时性能瓶颈很难预测，因为涉及的变量太多。
While many companies and LABS have been using x86 architectures for quite some time and don't anticipate variations, disruptive changes in technology are always difficult to predict.
尽管许多公司和实验室在很长时间内一直使用x86体系结构，并且不希望有任何变化，但是技术上的变化总是难以预测的。
While many companies and LABS have been using x86 architectures for quite some time and don't anticipate variations, disruptive changes in technology are always difficult to predict.
尽管许多公司和实验室在很长时间内一直使用x86体系结构，并且不希望有任何变化，但是技术上的变化总是难以预测的。
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