focus and difficulty

• 重点和难点

focus and difficulty的用法和样例：

例句

1. In design of HDD suspended by AMB, it is one, of difficulty and emphases that active control for rotor according as the signal of displacement.
   在磁悬浮硬盘设计中，传感器检测的转子位移信号是控制器对轴承进行主动控制的依据，是整个系统研究的重点和难点之一。
2. The influence of metro construction on neighboring buildings is becoming the emphasis and the difficulty in metro engineering.
   地铁施工对近邻建筑物的影响已成为地铁工程中的重点和难点。