如果某种情形发生——你是明白的——在这种情形里你需要一点儿帮助，遇到了一点儿困难，就给我写几个字来，你需要什么，我就会给你什么的。

And if certain circumstances should arise - you understand - in which you are in the least need, the least difficulty, send me one line, and you shall have by, return whatever you require.

youdao

如果某种情形发生——你是明白的——在这种情形里你需要一点儿帮助，遇到了一点儿困难，就给我写几个字来，你需要什么，我就会给你什么的。

And if certain circumstances should arise - you understand - in which you are in the least need, the least difficulty, send me one line, and you shall have by, return whatever you require.

youdao