《小学生作文辅导》:一段英文小说，帮忙翻译一下

下面是小说《Lolita》的一段原文，帮忙翻译一下：
Annabel was, like the writer, of mixed parentage: half-English, half-Dutch, in her case.
I remember her features far less distinctly today than I did a few years ago, before I knew Lolita.
There are two kinds of visual memory: one when you skillfully recreate an image in the laboratory of your mind, with your eyes open (and then I see Annabel in such general terms as: "honey-colored skin," "thin arms," "brown bobbed hair," "long lashes," "big bright mouth"); and the other when you instantly evoke, with shut eyes, on the dark inner side of your eyelids, the objective, absolutely optical replica of a beloved face, a little ghost in natural colors (and this is how I see Lolita).
Let me therefore primly limit myself, in describing Annabel, to saying she was a lovely child a few months my junior.
Her parents were old friends of my aunt's, and as stuffy as she.
They had rented a villa not far from Hotel Mirana.
Bald brown Mr. Leigh and fat, powdered Mrs. Leigh (born Vanessa van Ness).
How I loathed them!
At first, Annabel and I talked of peripheral affairs.
She kept lifting handfuls of fine sand and letting it pour through her fingers.
Our brains were turned the way those of intelligent European preadolescents were in our day and set, and I doubt if much individual genius should be assigned to our interest in the plurality of inhabited worlds, competitive tennis, infinity, solipsism and so on.
The softness and fragility of baby animals caused us the same intense pain. She wanted to be a nurse in some famished Asiatic country; I wanted to be a famous spy.

最好解释一下：第1句的”in her case”
第3句的”the objective”
第3句的”in natural colors”
第4句的”Let me therefore primly limit myself”