Under a DB scheme, it was up to the employer to fill any hole in the fund caused by a market shortfall; in a DC plan, the employee bears all the market risk.
在DB计划项下，雇主必须弥补由于市场短缺而造成的资金缺口；而在DC计划中，雇员则需要承担全部市场风险。
But, now there is a hole in my mouth. It will fill up later. Do you know how? A new tooth will take its place!
但是，我的嘴里却有一个洞。它以后会自己填上。你知道怎么填吗？一颗新牙齿会取代它！
To fill(a hole)tightly with or as if with a plug; stop up.
用塞塞紧，栓紧用或仿佛是用一个塞子来填紧（一个孔洞）；堵上。
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