足够长的英文表达方式有：

long enough

例句：

The rope is long enough to reach the ground. (这根绳子足够长可以到达地面。)
Is the queue long enough for you to see the stage? (队伍足够长让你看得到舞台吗？)
sufficient

例句：

We have sufficient evidence to prove his innocence. (我们有足够的证据证明他无罪。)
The salary is not sufficient to cover my expenses. (这份工资不足以支付我的开销。)
ample

例句：

The room has ample space for all the guests. (房间里有足够的空间容纳所有客人。)
There is ample time for you to finish the task. (你有足够的时间完成这项任务。)
enough

例句：

The water bottle holds enough water for one day. (这个水瓶能装下一天所需的水。)
Do you have enough money to buy the ticket? (你有足够的钱买票吗？)
sufficient

例句：

We have sufficient food for everyone. (我们有足够的食物供每个人。)
There is sufficient pght in the room to read. (房间里有足够的光线看书。)