In the rings event, gymnasts are lifted up to reach four rings.
举一反三
- The sealing rings are in four parts and pressed together around the piston rods by means of （）.
- All the rings are slightly rounded on their external top and bottom edges to keep the oil film on the cylinder liner during （） for new piston rings.
- The rings are heavy.
- The Olympic rings are ____, _____ , ______, _______ and ______ in color.
- If the telephone rings, I will answer it.（)