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
You'll see a stop sign.
会看到有个停车再开标 。
I feel guilty because I haven't written her lately.
因为我最近没给她写信，我感觉到有罪。
There is a boat in the river.
河里有一条船。