Often, such projects are the result of legislative log-rolling.
一般来说，这样的项目都是立法机关之间相互投赞成票所通过的议案结果。
《柯林斯英汉双解大词典》
2
If the client must be moved to the supine position, use the log-rolling technique to maintain spinal integrity.
如需将病人移至仰卧位，可采用滚木手法以保持脊柱完整。
3
The second restores to the most recent state, using a combination of full backup plus rolling forward the transaction log, called rollforward recovery.