关于依附的最初测试对象是非常年幼的孩子，观察他们在被母亲独自留在家中时有何反应。

The original tests of attachment were done in very young children, looking at how they responded when they were left alone by their mothers.

youdao

该BHO对象将依附于Internet Explorer，并显示一个文本框来显示当前正浏览的网页源码。

The object will attach itself to Internet Explorer only, and show a text box with the source code of the page being viewed.

youdao

听起来“安全依附”型的人是比较好的对象。

Sounds like "secure attachment" is the one to look for.

youdao