例句與造句

1. Effective activation of antigen - specific t cells not only requires the first signal transduction through t - cell receptor ( tcr ) binding with peptide - mhc complex on the antigen presenting cell ( apc ) , but also needs the second signal , termed costimulation . costimulation critical to the degree and consequence of t cell activation is provided by interaction between soluble factors or cell - surface molecules on the t cell and on the apc
   而t細(xì)胞的活化除需要t細(xì)胞受體( tcr )與抗原呈遞細(xì)胞( antigenpresentingcell , apc )表面的抗原肽- mhc復(fù)合物結(jié)合所形成的第一信號(hào)外，還需要t細(xì)胞和apc表面的其它膜分子結(jié)合所提供的共刺激信號(hào)(亦稱第二信號(hào)或輔助刺激信號(hào)， costimulatorysignal )的參與。
2. It's difficult to find t-cell receptor in a sentence. 用t-cell receptor造句挺難的