幫我翻譯這一段英文~~~Rooting...

Rooting percentage of cuttings is relatively low, which was determined to
always be less than 65% in ex vitro.

Rooting: 估計在這是指發芽或生長

Cutting: 收穫

Ex vitro: 這是我在Wikipedia找到的:

Some plants are micropropagated and grown in culture
and normal cuttings are made that are then rooted ex vitro

我覺得應該是野外生長的植物

Rooting percentage of cuttings is relatively low, which was determined to
always be less than 65% in ex vitro.

而生長和收割的比例相對來說是比在野外生長的植物(65%)要低的