translation.en: However, the problem with microRNAs is that we cannot use existing DNA-based technology to detect them in a reliable way, because they are very short sequences of nucleotides, much smaller than DNA.
translation.zh: 不过，微型RNA的问题在于 现有的基于DNA的科技 无法做到可靠的识别它们 因为它们是一串非常短序列的核苷酸 比DNA小得多