2. However, black holes can be
detectable if they interact with matter, e. g. by sucking in gas from an orbiting star.
然而,黑洞可以是可发现的,如果他们与问题互动,即通过吮在气体从一个轨道的星。
3. "Heroin was also found in
detectable levels in the samples taken in Madrid, but not in those from Barcelona, " the CSIC said.
“在马德里采集的样品中还发现微量的海洛因,但是在巴赛罗纳的样品中不含海洛因,”CSIC说。