Bǎ / bù / bì / yào / de / biàn / liàng / fàng / jìn / quán / jú / zuò / yòng / yù / kě / néng / huì / yǐn / fā / chōng / tū把不必要的变量放进全局作用域可能会引发冲突。Putting unnecessary variables in the global scope may cause conflicts.