求翻译：目前关于小白菊内酯抗肿瘤作用的研究尚处于初始阶段，报道较少。我们已对小白菊内酯进行了探索性实验研究，前期研究结果表明，小白菊内酯具有较好的体外抗肿瘤作用。是什么意思？

Current research on the anti-tumor effect of parthenolide is still in its infancy, rarely reported. Parthenolide exploratory experimental studies and preliminary study results show that parthenolide has good in vitro anti-tumor effect.

Within the current on beluga ju ester tumor research is still at the initial stage, less reporting. We have the Beluga ju esters in the exploratory experimental research, preliminary research results show that the Beluga ju ester has a fairly good tumor outside the body.