polar plasma的用法和樣例：
例句
- The middle piece is composed of plasma membrane, AVM, acrosomal vesicle cavity and acrosomal material.
主體部則由細胞質(zhì)帶圍繞細胞核構成。 - Apoplast is an important compartment outside of plasma membrane of the plant cell and is the source of various primary signals.
摘要細胞質(zhì)膜以外的質(zhì)外體是植物細胞的重要組成部分，質(zhì)外體是植物細胞的重要信號源和細胞器。
