So a lot has to trace back to the mother's thoughts.
很多事情可以追踪到母亲的思想。
It is also possible to trace back from lower to higher levels of abstractions.
从低层级到高层级的抽象也是可能的。
They ' re hardly likely to trace ' em back to us , are they ?
他们不太可能通过这些枪追查到我们不是吗?。
His father claims to be able to trace the family back to many centuries ago.
他父亲声称能把家世追溯到许多世纪之前。
His father claims to be able to trace the family back to many centuries ago.
他父亲声称能把家世追溯到许多世纪之前。
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