It was a hard task to remove the spilled substance.
清除溢出的物质是一项艰巨的任务。
It's a hard task that might take a lifetime.
这并非触手可得，或许需要我一生的努力。
This is often a hard task, due to AIX optimization of memory.
由于AIX内存优化，这常常是个难以完成的任务。
It's a wonder that you could finish such a hard task in such a short time.
真奇怪，你竟能在如此短的时间内完成艰巨的任务。
这个工程是一项艰巨的任务。
The practice of Wushu is a hard task;
习武是一项艰苦的工作；
To make study both fun and easy seemed to be a hard task.
使学习变得既有趣又容易，不是一件容易的事。
It 's a hard task to break up long habit in a short time.
长期养成的习惯，短期难以纠正。
It 's a hard task to break up long habit in a short time.
长期养成的习惯，短期难以纠正。
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