但是直到现在 But until then
但直到现在
But until now
以上为机器翻译结果，长、整句建议使用 人工翻译 。
但直到现在还没有足够的证据证明这一点。
Until now, however, proof has been lacking.
youdao
但直到现在，大多数工作仍然还是给足迹分类。
But until now most of the work was on classifying the tracks.
据猜想蛇也吃恐龙，但直到现在才有证据。
It's been suspected that snakes too ate dinosaurs, but until now there had been no proof.
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