attached task
被隶属任务, 子任务

take sb. to task
责备某人

Identifying the reasons for an emerging phenomenon which involves several complicated factors is far from an easy task . For example,some scientists attribute environmental deterioration to a series of natural factors,while others place the blame solely on inappropriate human behavior .
要找到涉及许多复杂因素的新现象的原因远非一件易事。例如，一些科学家把环境的恶化归结为一些自然因素，而另一些人把责任都推在人类不适当的行为上。

Of course, she's equal to the task
当然，她能胜任这工作。

Reversing undesirable social trends will be far from an easy task and will require a dramatic change in attitudes . A keen awareness of right from wrong is essential for determining appropriate social behavior .
扭转不好的社会趋势远非一件易事，看法需要有巨大的变化。对正误的深刻认识是判定得体的社会行为所必需的。

The arrival of the so-called ' Information Age ' will undoubtedly have a profound influence on our lives . The task at hand center on using the technology for beneficial purposes , while at the same time preventing intrusions of privacy and use of the electronic highway for deceitful purposes .
所谓“信息时代”的来临无疑将深刻地影响我们的生活。手头的任务主要是利用技术达到有意的目的，同时，防止侵犯隐私或者出于欺骗的目的利用电子高速路。

When the persuading and the planning for the western railroads had finally been completed,the really challenging task remained:the dangerous,sweaty,backbreaking,brawling business of actually building the lines.
当有关西部铁路的说服和规划工作终于完成后，真正艰难的任务还没有开始；即危险，吃力，需要伤筋动骨和吵吵嚷嚷的建造这些铁路的实际工作。