Definition: happening without any sudden movements or changes Level: C2
飞机平稳的降落归功于飞行员精湛的技术。
The aircraft's ___smooth landing was a credit to the pilot's skill.
得益于新的悬挂系统，这辆车在高速公路上行驶异常平稳。
Thanks to the new suspension, the car's ride over the motorway was remarkably ___smooth.
那辆车在车道上平稳地停了下来。
The car came to a ___smooth stop in the driveway.
