Shenhai Kuputika-Uchapupu
Kudya zvinenge 20 milliliters yebutane inogona kukonzera chepfu. Kana mwana akarasika njere, zvakakosha kuti ufambe nekukurumidza kubva panzvimbo ine utachiona uchienda kunzvimbo ine mhepo inofefetera zvakanaka kuti upe mweya wekufema.. Kurapa kunofanira kutsvakwa nokukurumidza, uye chiremba anorapa achashandisa matanho ekukurumidzira zvichienderana nehuwandu hwekuratidzwa.
Kunyangwe iyo concentration ye butane muzvibatiso zvenguva dzose zvakaderera, uye kufemerwa kwakaganhurirwa hakubviri kuva muchetura, zvakakosha kuve nechokwadi chekuti vana havakwanise kuwana kana kufema zvakawandisa, sezvo izvi zvichigona kukanganisa hutano hwavo.