A friend is one before whom I may think aloud.\x09
朋友就是我可以在其面前自言自语的人.那和talk to oneself的区别呢？talk to oneself（= think aloud = think out loud）意为“自言自语”, 即说出了声音,
例如：
She talked to herself: “What can I do? ” 她对自己说：“我该怎么办？”