Also, the kind of features that will be difficult to understand if you don't have a solid grounding in OOP and at least a beginner's knowledge of PHP object syntax.

而且，如果不具备oop的坚实基础以及PHP对象语法的初步知识，这类特性将会很难理解。

youdao

Technology will be plentiful and difficult to understand; human capital will not be plentiful and difficult to understand.

科技将会不断丰富，却难以被理解；人力资本不会无止境、但容易被理解。

youdao

The utterances will be flat and expressionless, and—sometimes—difficult to understand because the voices are not perfect.

说出来的话会是平淡且不带感情的，并且 — 有时候 — 难以理解，因为合成的声音不是很完美。

youdao

The path of the mortgage rate might be difficult to understand, so we will explain with an example.

FORBES: Introduction To Asset-Backed And Mortgage-Backed Securities

Chris is a world-class kicker, so I fully understand it will be a difficult task to become first choice.

BBC: Edinburgh take Jones from Falcons

Politically they understand it will be difficult for Mr Hollande to back away from his pledge to renegotiate the pact - at least until after the parliamentary elections in June.

BBC: Euro crisis: Can Merkel and Hollande find compromise?