In some cases, an appliance vendor-approved technician must perform the installation because it is so complex, with customers having to pay extra for this service.
某些情况下，由于安装起来太复杂，不得不请硬件工具供应商认可的技术人员来操作，这样公司为了使用该项服务还得额外多花钱。
I know that grammar is a headache of most of English learner because grammar is so complex and boring that it makes most of English learners give it up.
我知道，对于大多数英语学习者来说，语法真是令人一件头痛的事情，因为它复杂而且枯燥无味，所以很多人就放弃语法学习。
It is because they are adapted for such cultural activities - and not because of their cleverness as individuals - that human beings are able to do so many exceptionally complex and impressive things.
他们如此这般不是因为个体有多么聪明，而是由于他们溶于自己的文化氛围，而这会产生很多的文明成果。
The aluminum electromagnetic roll-casting system is a nonlinear complex system because of it involves machine, electric, casting and processing and so on.
铝电磁铸轧系统是涉及机械、电气、铸造和加工等多领域的非线性复杂系统。
Because we feel that in the past the first year program is too ambitious and complex, and so, we always have good results but we want it to do as to take it more slowly.
因为我们感觉过去一年级的课程过于急于求成和复杂，虽然我们往往能取得不错的结果不过我们还是把它放慢了。
Because this alkaloid is so structurally complex, the researchers applied a second principle - and used it for structural simplification.
由于生物碱的结构十分复杂，研究者们应用了第二条原理，并将其用于结构简化。
The more complex the interaction, the easier it is for the system to identify someone because the variability is so great.
由于变量如此之大，因此，人和机器的相互作用越复杂，系统就越容易识别用户。
Fabric wrinkle feature selection is a matter of combine optimizes, because it has complex character, such as non-linearity etc, so it is very difficult to get the answer through routine method.
织物起皱的特征选择是一个组合优化问题，其具有非线性等复杂特性。
Because complex vibrating targets are more complex than single-frequency targets, so it is more practical to research the feature extraction and identification of complex vibrating targets.
复合振动比单频振动更复杂，因此研究复合振动目标的特征提取与识别更具现实意义。
Because complex vibrating targets are more complex than single-frequency targets, so it is more practical to research the feature extraction and identification of complex vibrating targets.
复合振动比单频振动更复杂，因此研究复合振动目标的特征提取与识别更具现实意义。
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