Given a sentence in Tagalog language, translate the sentence to English language keeping the meaning of the original sentence intact.

Tagalog sentence: Sa 1898 Osgood-publish ng isang mahalagang papel sa mga solusyon ng mga kaugalian equation dy / dx = f (x, y) kasiya-siyang ang inireseta unang kondisyon y (a) = b.... Osgood ay nagpakita na kung f (x, y) ay patuloy na may umiiral na lamang ng hindi bababa sa isang solusyon...
In 1898 Osgood published an important paper on the solutions of the differential equation dy/dx = f(x, y) satisfying the prescribed initial conditions y(a) = b.... Osgood showed that if f(x, y) is merely continuous there exists at least one solution...

Tagalog sentence: Ang tanging paraan para mapatalsik ng BHB ang naghaharing sistema ay ang pagtataguyod ng estratehikong linya ng matagalang digmang bayan.
The only way for the NPA to overthrow the ruling system is to pursue the strategic line of protracted people's war.

Tagalog sentence: Isang freshener nararapat na gawin ang iyong balat tingle at pakiramdam nang mahigpit. Kung stings ito, masyado itong potent.

A freshener ought to make your skin tingle and feel tight. If it stings, it’s too potent.