1. 氣流分離移動的流線型的軀體上流體邊界層上的分隔物，如飛機的機翼，在平滑的流體流動中會引起故障和湍流
   A separation in the boundary layer of fluid about a moving streamlined body, such as the wing of an airplane, causing a breakdown in the smooth flow of fluid and resulting in turbulence.
2. 粘滯性的對流動有較高抵抗力的
   Having relatively high resistance to flow.
3. 沙漏；滴漏用于計時的儀器，由兩個玻璃盒組成，中由一細頸相連，盒內裝有一定量的沙子，水銀或其他流動物質，這些物質在一固定量的時間里，通常為一個小時，從上方的盒內慢慢流入下方的盒子中
   An instrument for measuring time, consisting of two glass chambers connected by a narrow neck and containing a quantity of sand, mercury, or another flowing substance that trickles from the upper chamber to the lower in a fixed amount of time, often one hour.
4. 電在（電路[導線]中）流動。
   Electricity is flowing (in the circuit/wires).

流的英語翻譯：

動的英語翻譯：