说不上

1. cannot say; cannot tell

♦ 他也~问题在哪儿。 He can't put his finger on what's wrong.

♦ 我~他来不来。 I can't say whether he is coming or not.

2. not worth mentioning

♦ 这些材料~有什么史料价值。 These materials can't be said to have much value as historical records.