through train：直通车

three-tier government structure 三层政府架构 | through train 直通车 | tie of votes 票数相等

hemiacetal linkage：半缩醛键联

hemicellulase 半纤维素酶 | hemiacetal linkage 半缩醛键联 | hemi-acetal 半缩醛

freebooter：海盗

freeboot 做海盗 | freebooter 海盗 | freebooting 强盗行为