1. The hobo walks around the street looking for food in the garbage.2. The police dog sniffs around for drugs in passengers' luggage.3. The canoe was swinging from side to side during the storm.4. The boat was swaying from side to side.
 swing sway walk around sniff aroundswing 跟 sway 都可以形容東西晃來晃去，如船、吊床等，walk around 指人晃來晃去，sniff around 指狗聞來聞去、晃來晃去。
The janitor neglected his duty on the day the robbers broke ino the school.