Case method of instruction and task-based approach are in accordance with the requirement of BEC teaching goal, for they could improve English application capacity in concrete business environment.
案例教学法和任务教学法符合剑桥商务英语教学目标的要求，能切实提高学生在具体的商务环境中实际运用英语语言的能力。
Design revision and practical application show that calculation in accordance with this formula is precise enough to satisfy production requirement. Calculation example is given too.
经修改设计及现场使用表明，按这些公式计算能满足生产要求，文中并给出了计算实例。
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