1. The problem is that the bridge is often unusable afterwards. 问题是，这种桥往往在震后不能再用了。
2. The effects of the wave destroyed both homes and livelihood, plus it rendered wells and reservoirs unusable. 的影响，这两个波摧毁的家园和生计，加上它提供的水井和水塘使用。
3. According to Microsoft, this obvious inconvenience and embarrassment does not yet render the computer unusable and it does not affect the applications or data on the computer. 据微软称，虽然这会给用户带来明显的不便和尴尬，但不会导致电脑不能使用，也不会影响电脑上的应用程序和数据。
