(B) The monitoring precision of SISE will be effected definitely when Kra or Lus around our country goes wrong, so it is necessary to build up more GSSs in our country. 6.

• （B）当我国周围Kra或Lus发生故障时，SISE监测的可靠性受到一定的影响，有必要在我国国内增设GSS。