Thien-chiông-thí (電漿體) he vu̍t-chṳt chhùn-chhai ke yit chúng chhong-thai, he 4 chúng kî-pún vu̍t-chṳt chhong-thai chṳ̂ yit. Thien-chiông-thí yit-pân voi chhai hi-thí su-ngie̍t fe̍t-chá he su to khiòng-li̍t ke thien-chhṳ̀-chhòng chok-yung sán-sâng.