meaning for 遮挡 zhēdǎng:

  • - to shelter
  • - to shelter from

gèng
zhòngyào重要
de
shì
měigé每隔
jǐge几个
xiǎoshí小时
qízhōng其中
de
yīkē一颗
màichōngxīng脉冲星
huì
zhēdǎng遮挡
lìngwài另外
yīkē一颗

Most important in this case, one pulsar eclipses the other briefly every couple of hours.