如果它不动，你必须在它上面再加压力气。
If it won't move you'll have to bring more force to bear on it.
在热加工过程中，将金属升温，使其处于粘性即可塑状态，再加压使其流动而不折断。
In a hot-working process, the metal is brought to the viscous or plastic state by subjecting it to elevated temperature, and by the use of pressure it flows without fracture.
结论：应及时用MTX对细胞株进行再加压筛选以及保存，以保持细胞稳定表达抗体的能力；
Conclusion: MTX selection should be timely used to overcome the instability of the expression of anti HBsAg in CHO HB2 cells.
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