母离子扫描模式是扫描共同（指定）子离子的所有母体（母离子），通常也用于结构解析。 The centimeter is part with the metric technique, adopted in most nations around the world presently. The bottom device will be the meter, that is defined by the space light travels in vacuum in a portion of the second. A centimeter is defined as one/one hundred of the meter, https://keeganxflpu.thezenweb.com/akhuwat-foundation-online-apply-things-to-know-before-you-buy-74271080