松散载荷层滞后垮落，形成第二次冲击载荷，三个过程间隔时间很短；

Third, granular-mass loading stratum descended after a while , which brought second impact load, the interval among the three courses was short.

youdao

查尔斯·吉布森和黛安·索耶在ABC是更快，吉布森说，第二次冲击后，几乎立即，一个“协力攻击”美国是正在进行中。

Charles Gibson and Diane Sawyer at ABC are much quicker, with Gibson saying almost immediately after the second impact that a "concerted effort to attack" America was underway.

youdao