互访: exchange visits...
睡: to sleep, to lie down...
后人: later generation...
加油: to add oil, to top up with gas, to refuel, to accelerate, to step on the gas, to make an extra effort, to cheer sb on...
怠慢: to slight, to neglect...
一次性: one-off (offer), one-time, single-use, disposable (goods)...
超车: to overtake (another car)...
材料: material, data, makings, stuff...
嗨: oh alas, hey!, hi! (loanword), a high (natural or drug-induced) (loanword)...
不怎么: not very, not particularly...
