The powerful icebreaker took part in the rescue operation to save the Italian polar expedition led by Umberto Nobile.

这艘强劲的破冰船参与了安伯托·诺比尔的营救行动。 当时他正带领一支意大利北极探险队。

The 21 traits of 42 cultivators in Dendrobium nobile were studied by morphological variance and correlation and principal component analyses.

采用多元统计分析，对春石斛兰花42个栽培种21个主要性状进行了形态变异、性状相关和主成分分析。