acyclic hydrocarbon

例句：

1. 1. The process is acyclic and does not require any intermediate steps.
   该过程是无环的，不需要任何中间步骤。
2. 2. The chemical reaction is non-cyclic and proceeds directly to the product.
   化学反应是非循环的，直接进行到产物。
3. 3. The design of the machine is cyclic-free, ensuring smooth operation without cycles.
   机器的设计是无循环的，确保平滑运行，没有周期。