“缓慢地”的英语？

一辆公交车从小径尽头的路上缓慢地隆隆驶过。A bus rumbled along the road at the top of the path.人们排成一列缓慢地依次走进房间，并坐了下来。Slowly, people filed into the room and sat down.它能使尼古丁平稳缓慢地渗透到血液里。It allows nicotine to diffuse slowly and steadily into the ...