The trouble is that...
困难在于...
🧩 词语组成解析
the
[ðə]
art. 指已提到的人（物）;指说话人与听者已知的人（物）;用于独一无二的事物前;与形容词最高级和序数词连用;
is
[ɪz]
vt.& vi. 是（be的三单形式;
n. 存在;
🗣️ 情景例句
Why does the boss have such a large, comfortable chair?
为什么老板有张那么舒服宽大的椅子？
What will it be after the clear weather?
晴天以后天气会怎么样？
Hardly anyone can positively enjoy sitting in a train for more than a few hours.
很少有人能够真正喜欢坐几个小时以上的火车。