The idea is to replace that cycle with something else, "says Jeff Lynn of NIST's Center for Neutron Research."

这样做是为了别的，更换周期，“杰夫说，NIST的中子的研究琳的中心。”

youdao

Given a start with some other fissile material (U-233, U-235 or Pu-239) as a driver, a breeding cycle similar to but more efficient than that with U-238 and plutonium (in normal, slow neutron reactors) can be set up. (The driver fuels provide all the neutrons initially, but are progressively supplemented by U-233 as it forms from the thorium.) However, there are also features of the neutron economy which counter this advantage.

FORBES: Is Thorium the Biggest Energy Breakthrough Since Fire? Possibly.