1. His redefection shocked everyone who had thought he was loyal to the group.
他的再叛逃令每个曾以为他对这个团体忠诚的人都感到震惊。

2. The politician's redefection to his original party caused a major political upheaval.
这位政治家重新叛逃回他最初所在的政党，引发了一场重大的政治动荡。