Of course,they must be careful not to let it take up too much of their

Of course,they must be careful not to let it take up too much of their
Of course,they must be careful not to let it take up too much of their

Of course,they must be careful not to let it take up too much of their
当然,他们必须小心,不要让它占用太多的时间

当然 他们要很谨慎，不会让它占用太多时间

当然，他们必须要小心不要让它占据他们过多的时间

理所当然的，他们必须十分谨慎以防让这个花去他们太多的时间。
不是机译^^

他们要很谨慎，不会让它占用太多时间