1·Traditionally the relatedness of species has been ascertained by a close comparison of their anatomy.
传统上，物种的亲缘关系是通过对它们的解剖结构的密切比较来确定的。
2·Popper believed his experiment demonstrated that, contrary to Heisenberg, both a particle's position and its momentum could be precisely ascertained at the same time.
波普尔认为他的试验表明，跟海森堡相反，粒子的位置和动量两者都可在同一时间精确确定。
3·Article 21 of the Law shall be applicable after authorship of the work becomes ascertained.
作者身份一旦确定，适用著作权法第二十一条的规定。
4·The cause of death was "yet to be ascertained," said another official in the coroner's office.
死亡的原因“还不能确定”，办公室里的另一名验尸官说到。
5·"The cause of death was" yet to be ascertained, "said another official in the coroner's office."
死亡的原因“还不能确定”，办公室里的另一名验尸官说到。