block:to prevent sth from happening, developing or making progress 妨碍；阻碍
The proposed merger has been blocked by the government.
建议中的合并计划遭到了来自政府的阻力。
merger:the act of joining two or more organizations or businesses into one （机构或企业的）合并,归并
a merger between the two banks
两家银行的合并
our proposed merger with the university
我们与这所大学提议中的合并
efficient:doing sth well and thoroughly with no waste of time, money, or energy 效率高的；有能力的
an efficient secretary/teacher/manager
能干的秘书／教师／经理
efficient heating equipment
效能好的供暖设备
the efficient use of energy
能源的有效利用
As we get older, our bodies become less efficient at burning up calories.
随着一天天衰老，我们的身体消耗热量的功能逐渐减弱。
fuel-efficient cars(= that do not use much fuel)
节能汽车
