The operating principle of internal-combustionengine mode is similar to the four-strokeinternalcombustionengine, so it will inevitably produce harmful emissions.
内燃机模式的工作原理与普通四冲程内燃机相同,因此不可避免的也会产生有害排放物。
2
Otto built the practical four-strokeinternalcombustionengine called the "Otto Cycle Engine, " and as soon as he had completed his engine, he built it into a motorcycle.