fern是什么意思,fern怎么读,
词根:fern
adj.ferny 蕨类的;多蕨的;像蕨的
1.Bracken fern has been spreading from its woodland strongholds for centuries, but the rate of encroachment into open countryside has lately increased alarmingly throughout northern and western Britain.
蕨类植物已经从它的林地据点向外蔓延了几个世纪,但是最近在整个英国北部和西部,蕨类植物侵入开阔乡村的速度却惊人地增长。
3.Most marine deposits from around the world contain either plankton or a lot of fern spores but not both together in the same layer.
世界上大多数的海洋沉积物不是含有浮游生物就是含有大量的蕨类孢子,但它们并不是同时存在于同一层中。