We may have been physically able to speak從生理上說我們那時就可以說話了

able to 能做 ...

You are better able to do it than I (am).

你比我更有能力做這件事。

I am able to pick you up on the short wave radio.

我能用短波收音機收聽到你的信號。

it's more likely that the birth of language coincided with the proliferation of man-made objects around 50,000 years ago.語言的產生應該是在五萬年前與人造工具廣泛流傳的時間相同

coincided with符合； 與 ... 一致

My free time does not coincide with his.

我和他不是同時有空。

Your views coincide with my own.

你的看法同我的看法不謀而合。

so these things seemed to appear rather abruptly,這些東西似乎是突然之間大量涌現(xiàn)

seem to似乎 ...

Peter and Susan seem to be cut out for each other.

彼得和蘇珊似乎是天生的一對。

A pall of mystery seem to hang over it all.

整個事件似乎籠罩上一層神秘的氣氛。