That these free methods to do the same it?

那这些免费的方法能行的通吗？

youdao

So there has been a great deal of interest in applying model-free methods such as fuzzy systems for nonlinear function approximation.

因此依然有很多场合需要使用无模型方法—如用模糊系统进行非线性函数逼近等。

youdao

The high resolution spectrum can be obtained through many methods, such as saturated absorption spectroscopy, Doppler free methods of two-photon spectroscopy, and etc.

提高热原子光谱的分辨率可以有许多方法，如饱和吸收光谱技术、双光子光谱的消多普勒技术等。

youdao

Low-mercury and mercury-free methods are available, but socio-economic factors often act as barriers to miners adopting these alternative ways to extract gold, the authors add.

BBC: UN: Rising mercury emissions increase risk to humans

Finally, you can also try other drug-free methods of making your child feel better, such as rocking, holding, singing, offering a pacifier, or distracting him with a toy.

CNN: How can I soothe a teething baby's gums?

How about we start by fully researching all the free, less invasive methods, first?

FORBES: Genetic Engineering: A Food Fix?